source_code: import java.io.*;
  import java.util.Arrays;
  import java.util.Random;
  import java.util.StringJoiner;
  import java.util.StringTokenizer;
  import java.util.concurrent.ThreadLocalRandom;
  import java.util.function.Function;
  
  public class Main {
  
      static int T;
  
      public static void main(String[] args) {
          FastScanner sc = new FastScanner(System.in);
          T = sc.nextInt();
  
          PrintWriter pw = new PrintWriter(System.out);
          for (int i = 0; i < T; i++) {
              int n = sc.nextInt();
              int[] a = sc.nextIntArray(n);
              int[] ans = solve(n, a);
              StringJoiner j = new StringJoiner(" ");
              for (int each : ans) {
                  j.add(String.valueOf(each));
              }
              pw.println(j.toString());
          }
          pw.flush();
      }
  
      static int[] solve(int N, int[] A) {
          // a/b が1に近いものを探す
          shuffle(A);
          Arrays.sort(A);
          int cur = A[0];
          int time = 1;
          double r = 0;
          int prev = -1;
          int a = -1;
          int b = -1;
          for (int i = 1; i < N; i++) {
              if( cur == A[i] ) {
                  time++;
  
                  if( time == 2 ) {
                      if( prev != -1 ) {
                          double r1 = (double)prev/cur;
                          if( r1 > r ) {
                              r = r1;
                              a = prev;
                              b = cur;
                          }
                      }
                      prev = cur;
                  }
  
                  if( time == 4 ) {
                      return new int[]{cur, cur, cur, cur};
                  }
  
              } else {
                  time = 1;
                  cur = A[i];
              }
          }
  
          return new int[]{a, a, b, b};
      }
  
      static void shuffle(int[] a) {
          Random r = ThreadLocalRandom.current();
          for (int i = a.length-1; i >= 0; i--) {
              int j = r.nextInt(i+1);
              int t = a[i];
              a[i] = a[j];
              a[j] = t;
          }
      }
  
      @SuppressWarnings("unused")
      static class FastScanner {
          private BufferedReader reader;
          private StringTokenizer tokenizer;
  
          FastScanner(InputStream in) {
              reader = new BufferedReader(new InputStreamReader(in));
              tokenizer = null;
          }
  
          String next() {
              if (tokenizer == null || !tokenizer.hasMoreTokens()) {
                  try {
                      tokenizer = new StringTokenizer(reader.readLine());
                  } catch (IOException e) {
                      throw new RuntimeException(e);
                  }
              }
              return tokenizer.nextToken();
          }
  
          String nextLine() {
              if (tokenizer == null || !tokenizer.hasMoreTokens()) {
                  try {
                      return reader.readLine();
                  } catch (IOException e) {
                      throw new RuntimeException(e);
                  }
              }
              return tokenizer.nextToken("\n");
          }
  
          long nextLong() {
              return Long.parseLong(next());
          }
  
          int nextInt() {
              return Integer.parseInt(next());
          }
  
          int[] nextIntArray(int n) {
              int[] a = new int[n];
              for (int i = 0; i < n; i++)
                  a[i] = nextInt();
              return a;
          }
  
          int[] nextIntArray(int n, int delta) {
              int[] a = new int[n];
              for (int i = 0; i < n; i++)
                  a[i] = nextInt() + delta;
              return a;
          }
  
          long[] nextLongArray(int n) {
              long[] a = new long[n];
              for (int i = 0; i < n; i++)
                  a[i] = nextLong();
              return a;
          }
      }
  
      static <A> void writeLines(A[] as, Function<A, String> f) {
          PrintWriter pw = new PrintWriter(System.out);
          for (A a : as) {
              pw.println(f.apply(a));
          }
          pw.flush();
      }
  
      static void writeLines(int[] as) {
          PrintWriter pw = new PrintWriter(System.out);
          for (int a : as) pw.println(a);
          pw.flush();
      }
  
      static void writeLines(long[] as) {
          PrintWriter pw = new PrintWriter(System.out);
          for (long a : as) pw.println(a);
          pw.flush();
      }
  
      static int max(int... as) {
          int max = Integer.MIN_VALUE;
          for (int a : as) max = Math.max(a, max);
          return max;
      }
  
      static int min(int... as) {
          int min = Integer.MAX_VALUE;
          for (int a : as) min = Math.min(a, min);
          return min;
      }
  
      static void debug(Object... args) {
          StringJoiner j = new StringJoiner(" ");
          for (Object arg : args) {
              if (arg instanceof int[]) j.add(Arrays.toString((int[]) arg));
              else if (arg instanceof long[]) j.add(Arrays.toString((long[]) arg));
              else if (arg instanceof double[]) j.add(Arrays.toString((double[]) arg));
              else if (arg instanceof Object[]) j.add(Arrays.toString((Object[]) arg));
              else j.add(arg.toString());
          }
          System.err.println(j.toString());
      }
  }
  