description: This is a simplified version of the problem B2. Perhaps you should read the problem B2 before you start solving B1.
  
  Paul and Mary have a favorite string s which consists of lowercase letters of the Latin alphabet. They want to paint it using pieces of chalk of two colors: red and green. Let's call a coloring of a string wonderful if the following conditions are met:
  
    1. each letter of the string is either painted in exactly one color (red or green) or isn't painted; 
    2. each two letters which are painted in the same color are different; 
    3. the number of letters painted in red is equal to the number of letters painted in green; 
    4. the number of painted letters of this coloring is maximum among all colorings of the string which meet the first three conditions. 
  
  
  
  E. g. consider a string s equal to "kzaaa". One of the wonderful colorings of the string is shown in the figure.
  
  <image> The example of a wonderful coloring of the string "kzaaa".
  
  Paul and Mary want to learn by themselves how to find a wonderful coloring of the string. But they are very young, so they need a hint. Help them find k — the number of red (or green, these numbers are equal) letters in a wonderful coloring.
  
  Input
  
  The first line contains one integer t (1 ≤ t ≤ 1000) — the number of test cases. Then t test cases follow.
  
  Each test case consists of one non-empty string s which consists of lowercase letters of the Latin alphabet. The number of characters in the string doesn't exceed 50.
  
  Output
  
  For each test case, output a separate line containing one non-negative integer k — the number of letters which will be painted in red in a wonderful coloring.
  
  Example
  
  Input
  
  
  5
  kzaaa
  codeforces
  archive
  y
  xxxxxx
  
  
  Output
  
  
  2
  5
  3
  0
  1
  
  Note
  
  The first test case contains the string from the statement. One of the wonderful colorings is shown in the figure. There's no wonderful coloring containing 3 or more red letters because the total number of painted symbols will exceed the string's length.
  
  The string from the second test case can be painted as follows. Let's paint the first occurrence of each of the letters "c", "o", "e" in red and the second ones in green. Let's paint the letters "d", "f" in red and "r", "s" in green. So every letter will be painted in red or green, hence the answer better than 5 doesn't exist.
  
  The third test case contains the string of distinct letters, so you can paint any set of characters in red, as long as the size of this set doesn't exceed half of the size of the string and is the maximum possible.
  
  The fourth test case contains a single letter which cannot be painted in red because there will be no letter able to be painted in green.
  
  The fifth test case contains a string of identical letters, so there's no way to paint more than one letter in red.
solution: import java.io.OutputStream;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.PrintStream;
  import java.util.Arrays;
  import java.io.UncheckedIOException;
  import java.io.Closeable;
  import java.io.Writer;
  import java.io.OutputStreamWriter;
  import java.util.HashMap;
  import java.util.HashSet;
  import java.util.InputMismatchException;
  
  /*
  @author : sanskarXrawat
  @date   : 7/23/2021
  @time   : 8:01 PM
   */
  
  public class A {
  
  
      public static void main(String[] args) throws Throwable {
          Thread thread = new Thread (null, new TaskAdapter (), "", 1 << 29);
          thread.start ();
          thread.join ();
      }
  
      static class TaskAdapter implements Runnable {
          @Override
          public void run() {
              InputStream inputStream = System.in;
              OutputStream outputStream = System.out;
              FastInput in = new FastInput (inputStream);
              FastOutput out = new FastOutput (outputStream);
              Solution solver = new Solution ();
              solver.solve (1, in, out);
              out.close ();
          }
      }
  
      static class Solution {
          static final Debug debug = new Debug (true);
  
          public void solve(int testNumber, FastInput in, FastOutput out) {
  
              int test= in.ri ();
  
              while (test-->0){
                  char[] s=in.readString ().toCharArray ();
  
                  HashMap<Integer,Integer> map=new HashMap<> ();
  
                  for (char c : s) map.merge (c - '0', 1, Integer::sum);
  
                      int G = 0,ans=0;
                      for(Integer o:map.values ()){
                          if((o^1)==0) G++;
                          else ans++;
                      }
                      out.prtl (ans+=G>>>1);
              }
  
          }
  
      }
  
  
      static class FastOutput implements AutoCloseable, Closeable, Appendable {
          private final StringBuilder cache = new StringBuilder (THRESHOLD * 2);
          private static final int THRESHOLD = 32 << 10;
          private final Writer os;
  
          public FastOutput append(CharSequence csq) {
              cache.append (csq);
              return this;
          }
  
          public FastOutput append(CharSequence csq, int start, int end) {
              cache.append (csq, start, end);
              return this;
          }
  
          private void afterWrite() {
              if (cache.length () < THRESHOLD) {
                  return;
              }
              flush ();
          }
  
          public FastOutput(Writer os) {
              this.os = os;
          }
  
          public FastOutput(OutputStream os) {
              this (new OutputStreamWriter (os));
          }
  
          public FastOutput append(char c) {
              cache.append (c);
              afterWrite ();
              return this;
          }
  
          public FastOutput append(String c) {
              cache.append (c);
              afterWrite ();
              return this;
          }
  
          public FastOutput println(String c) {
              return append (c).println ();
          }
  
          public FastOutput println() {
              return append ('\n');
          }
  
          final <T> void prt(T a) {
              append (a + " ");
          }
  
          final <T> void prtl(T a) {
              append (a + "\n");
          }
  
          public FastOutput flush() {
              try {
                  os.append (cache);
                  os.flush ();
                  cache.setLength (0);
              } catch (IOException e) {
                  throw new UncheckedIOException (e);
              }
              return this;
          }
  
          public void close() {
              flush ();
              try {
                  os.close ();
              } catch (IOException e) {
                  throw new UncheckedIOException (e);
              }
          }
  
          public String toString() {
              return cache.toString ();
          }
  
          public FastOutput printf(String format, Object... args) {
              return append (String.format (format, args));
          }
  
          private static int countDigits(long l) {
              if (l >= 1000000000000000000L) return 19;
              if (l >= 100000000000000000L) return 18;
              if (l >= 10000000000000000L) return 17;
              if (l >= 1000000000000000L) return 16;
              if (l >= 100000000000000L) return 15;
              if (l >= 10000000000000L) return 14;
              if (l >= 1000000000000L) return 13;
              if (l >= 100000000000L) return 12;
              if (l >= 10000000000L) return 11;
              if (l >= 1000000000L) return 10;
              if (l >= 100000000L) return 9;
              if (l >= 10000000L) return 8;
              if (l >= 1000000L) return 7;
              if (l >= 100000L) return 6;
              if (l >= 10000L) return 5;
              if (l >= 1000L) return 4;
              if (l >= 100L) return 3;
              if (l >= 10L) return 2;
              return 1;
          }
  
          private static int countDigits(int l) {
              if (l >= 1000000000) return 10;
              if (l >= 100000000) return 9;
              if (l >= 10000000) return 8;
              if (l >= 1000000) return 7;
              if (l >= 100000) return 6;
              if (l >= 10000) return 5;
              if (l >= 1000) return 4;
              if (l >= 100) return 3;
              if (l >= 10) return 2;
              return 1;
          }
  
      }
  
  
      static class FastInput {
          private final StringBuilder defaultStringBuf = new StringBuilder (1 << 13);
          private final ByteBuffer tokenBuf = new ByteBuffer ();
          private final byte[] buf = new byte[1 << 13];
          private SpaceCharFilter filter;
          private final InputStream is;
          private int bufOffset;
          private int bufLen;
          private int next;
          private int ptr;
  
          public FastInput(InputStream is) {
              this.is = is;
          }
  
          public void populate(int[] data) {
              for (int i = 0; i < data.length; i++) {
                  data[i] = readInt ();
              }
          }
  
          public void populate(long[] data) {
              for (int i = 0; i < data.length; i++) {
                  data[i] = readLong ();
              }
          }
  
          private int read() {
              while (bufLen == bufOffset) {
                  bufOffset = 0;
                  try {
                      bufLen = is.read (buf);
                  } catch (IOException e) {
                      bufLen = -1;
                  }
                  if (bufLen == -1) {
                      return -1;
                  }
              }
              return buf[bufOffset++];
          }
  
          public void skipBlank() {
              while (next >= 0 && next <= 32) {
                  next = read ();
              }
          }
  
          public String next() {
              return readString ();
          }
  
          public int ri() {
              return readInt ();
          }
  
          public int readInt() {
              boolean rev = false;
  
              skipBlank ();
              if (next == '+' || next == '-') {
                  rev = next == '-';
                  next = read ();
              }
  
              int val = 0;
              while (next >= '0' && next <= '9') {
                  val = val * 10 - next + '0';
                  next = read ();
              }
  
              return rev ? val : -val;
          }
  
          public long readLong() {
              boolean rev = false;
  
              skipBlank ();
              if (next == '+' || next == '-') {
                  rev = next == '-';
                  next = read ();
              }
  
              long val = 0L;
              while (next >= '0' && next <= '9') {
                  val = val * 10 - next + '0';
                  next = read ();
              }
  
              return rev ? val : -val;
          }
  
          public long rl() {
              return readLong ();
          }
  
          public String readString(StringBuilder builder) {
              skipBlank ();
  
              while (next > 32) {
                  builder.append ((char) next);
                  next = read ();
              }
  
              return builder.toString ();
          }
  
          public String readString() {
              defaultStringBuf.setLength (0);
              return readString (defaultStringBuf);
          }
  
          public int rs(char[] data, int offset) {
              return readString (data, offset);
          }
  
          public char[] rsc() {
              return readString ().toCharArray ();
          }
  
          public int rs(char[] data) {
              return rs (data, 0);
          }
  
          public int readString(char[] data, int offset) {
              skipBlank ();
  
              int originalOffset = offset;
              while (next > 32) {
                  data[offset++] = (char) next;
                  next = read ();
              }
  
              return offset - originalOffset;
          }
  
          public char rc() {
              return readChar ();
          }
  
          public char readChar() {
              skipBlank ();
              char c = (char) next;
              next = read ();
              return c;
          }
  
          public double rd() {
              return nextDouble ();
          }
  
          public double nextDouble() {
              int c = read ();
              while (isSpaceChar (c))
                  c = read ();
              int sgn = 1;
              if (c == '-') {
                  sgn = -1;
                  c = read ();
              }
              double res = 0;
              while (!isSpaceChar (c) && c != '.') {
                  if (c == 'e' || c == 'E')
                      return res * Math.pow (10, readInt ());
                  if (c < '0' || c > '9')
                      throw new InputMismatchException ();
                  res *= 10;
                  res += c - '0';
                  c = read ();
              }
              if (c == '.') {
                  c = read ();
                  double m = 1;
                  while (!isSpaceChar (c)) {
                      if (c == 'e' || c == 'E')
                          return res * Math.pow (10, readInt ());
                      if (c < '0' || c > '9')
                          throw new InputMismatchException ();
                      m /= 10;
                      res += (c - '0') * m;
                      c = read ();
                  }
              }
              return res * sgn;
          }
  
          public boolean isSpaceChar(int c) {
              if (filter != null)
                  return filter.isSpaceChar (c);
              return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1;
          }
  
          public interface SpaceCharFilter {
              public boolean isSpaceChar(int ch);
          }
  
          public final int readByteUnsafe() {
              if (ptr < bufLen) return buf[ptr++];
              ptr = 0;
              try {
                  bufLen = is.read (buf);
                  if (bufLen > 0) {
                      return buf[ptr++];
                  } else {
                      return -1;
                  }
              } catch (IOException e) {
                  throw new UncheckedIOException (e);
              }
          }
  
          public final int readByte() {
              if (ptr < bufLen) return buf[ptr++];
              ptr = 0;
              try {
                  bufLen = is.read (buf);
                  if (bufLen > 0) {
                      return buf[ptr++];
                  } else {
                      throw new java.io.EOFException ();
                  }
              } catch (IOException e) {
                  throw new UncheckedIOException (e);
              }
          }
  
          public final String nextLine() {
              tokenBuf.clear ();
              for (int b = readByte (); b != '\n'; b = readByteUnsafe ()) {
                  if (b == -1) break;
                  tokenBuf.append (b);
              }
              return new String (tokenBuf.getRawBuf (), 0, tokenBuf.size ());
          }
  
          public final String nl() {
              return nextLine ();
          }
  
          public final boolean hasNext() {
              for (int b = readByteUnsafe (); b <= 32 || b >= 127; b = readByteUnsafe ()) {
                  if (b == -1) return false;
              }
              --ptr;
              return true;
          }
  
          private static final class ByteBuffer {
              private static final int DEFAULT_BUF_SIZE = 1 << 12;
              private byte[] buf;
              private int ptr = 0;
  
              private ByteBuffer(int capacity) {
                  this.buf = new byte[capacity];
              }
  
              private ByteBuffer() {
                  this (DEFAULT_BUF_SIZE);
              }
  
              private ByteBuffer append(int b) {
                  if (ptr == buf.length) {
                      int newLength = buf.length << 1;
                      byte[] newBuf = new byte[newLength];
                      System.arraycopy (buf, 0, newBuf, 0, buf.length);
                      buf = newBuf;
                  }
                  buf[ptr++] = (byte) b;
                  return this;
              }
  
              private char[] toCharArray() {
                  char[] chs = new char[ptr];
                  for (int i = 0; i < ptr; i++) {
                      chs[i] = (char) buf[i];
                  }
                  return chs;
              }
  
              private byte[] getRawBuf() {
                  return buf;
              }
  
              private int size() {
                  return ptr;
              }
  
              private void clear() {
                  ptr = 0;
              }
          }
  
  
      }
  
  
      static class Debug {
          private final boolean offline;
          private final PrintStream out = System.err;
          static int[] empty = new int[0];
  
          public Debug(boolean enable) {
              offline = enable && System.getSecurityManager () == null;
          }
  
          public Debug debug(String name, Object x) {
              return debug (name, x, empty);
          }
  
          public Debug debug(String name, long x) {
              if (offline) {
                  debug (name, "" + x);
              }
              return this;
          }
  
          public Debug debug(String name, String x) {
              if (offline) {
                  out.printf ("%s=%s", name, x);
                  out.println ();
              }
              return this;
          }
  
          public Debug debug(String name, Object x, int... indexes) {
              if (offline) {
                  if (x == null || !x.getClass ().isArray ()) {
                      out.append (name);
                      for (int i : indexes) {
                          out.printf ("[%d]", i);
                      }
                      out.append ("=").append ("" + x);
                      out.println ();
                  } else {
                      indexes = Arrays.copyOf (indexes, indexes.length + 1);
                      if (x instanceof byte[]) {
                          byte[] arr = (byte[]) x;
                          for (int i = 0; i < arr.length; i++) {
                              indexes[indexes.length - 1] = i;
                              debug (name, arr[i], indexes);
                          }
                      } else if (x instanceof short[]) {
                          short[] arr = (short[]) x;
                          for (int i = 0; i < arr.length; i++) {
                              indexes[indexes.length - 1] = i;
                              debug (name, arr[i], indexes);
                          }
                      } else if (x instanceof boolean[]) {
                          boolean[] arr = (boolean[]) x;
                          for (int i = 0; i < arr.length; i++) {
                              indexes[indexes.length - 1] = i;
                              debug (name, arr[i], indexes);
                          }
                      } else if (x instanceof char[]) {
                          char[] arr = (char[]) x;
                          for (int i = 0; i < arr.length; i++) {
                              indexes[indexes.length - 1] = i;
                              debug (name, arr[i], indexes);
                          }
                      } else if (x instanceof int[]) {
                          int[] arr = (int[]) x;
                          for (int i = 0; i < arr.length; i++) {
                              indexes[indexes.length - 1] = i;
                              debug (name, arr[i], indexes);
                          }
                      } else if (x instanceof float[]) {
                          float[] arr = (float[]) x;
                          for (int i = 0; i < arr.length; i++) {
                              indexes[indexes.length - 1] = i;
                              debug (name, arr[i], indexes);
                          }
                      } else if (x instanceof double[]) {
                          double[] arr = (double[]) x;
                          for (int i = 0; i < arr.length; i++) {
                              indexes[indexes.length - 1] = i;
                              debug (name, arr[i], indexes);
                          }
                      } else if (x instanceof long[]) {
                          long[] arr = (long[]) x;
                          for (int i = 0; i < arr.length; i++) {
                              indexes[indexes.length - 1] = i;
                              debug (name, arr[i], indexes);
                          }
                      } else {
                          Object[] arr = (Object[]) x;
                          for (int i = 0; i < arr.length; i++) {
                              indexes[indexes.length - 1] = i;
                              debug (name, arr[i], indexes);
                          }
                      }
                  }
              }
              return this;
          }
  
      }
  }