func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios_base::sync_with_stdio(false), cin.tie(nullptr), cout.tie(nullptr);     long long int t;     cin >> t;     while (t--) {       string s;       cin >> s;       if (s.size() == 1) {         cout << 0 << endl;         continue;       }       map<char, int> m;       int i;       int count = 0;       for (i = 0; i < s.size(); i++) {         m[s[i]]++;       }       for (auto it : m) {         if (it.second > 1) {           count += 2;         } else if (it.second == 1) {           count += 1;         }       }       cout << count / 2 << endl;     }   }   