func_code_string: #include <bits/stdc++.h>   using namespace std;   long long n, m;   int main() {     ios_base::sync_with_stdio(0);     cin.tie(0);     cout.tie(0);     int TC;     cin >> TC;     while (TC--) {       map<char, int> mp;       string s;       cin >> s;       for (int i = 0; i < s.size(); i++) {         if (mp[s[i]] <= 1) mp[s[i]]++;       }       int x1 = 0, x2 = 0;       for (auto i : mp) {         if (i.second == 2) x2++;         if (i.second == 1) x1++;       }       long long ans = (x1 / 2) + x2;       cout << ans <<   n ;     }   }   