func_code_string: #include <bits/stdc++.h>   using namespace std;   bool allCharactersSame(string s) {     int n = s.length();     for (int i = 1; i < n; i++)       if (s[i] != s[0]) return false;     return true;   }   signed main() {     int n;     const int letters = 26;     cin >> n;     for (int i = 0; i < n; i++) {       string str;       cin >> str;       int n = str.size();       vector<int> cnt(letters);       for (int i = 0; i < n; ++i) cnt[str[i] -  a ]++;       int ans = 0, k = 0;       for (int i = 0; i < letters; ++i) {         if (cnt[i] > 1)           ans++;         else if (cnt[i] == 1)           k++;       }       ans += k / 2;       cout << ans <<   n ;     }     return 0;   }   