func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     string ss[100];     int n, ans = 0, cur;     cin >> n;     for (int i = 0; i < n; i++) cin >> ss[i];     for (char a =  a ; a <=  z ; a++)       for (char b =  a ; b <=  z ; b++) {         cur = 0;         for (int i = 0; i < n; i++) {           int l = ss[i].length();           bool ok = true;           while (l--) {             if (ss[i][l] != a && ss[i][l] != b) ok = false;           }           if (ok) cur += ss[i].length();         }         ans = max(ans, cur);       }     cout << ans;     return 0;   }   