func_code_string: #include <bits/stdc++.h>   using namespace std;   int lim = 1e6;   int inf = 1e9 + 7;   bool ispal(string s) {     int n = s.size();     bool ans = true;     for (int i = 0; i < n / 2; i++) {       if (s[i] != s[n - i - 1]) {         ans = false;         break;       }     }     return ans;   }   int main() {     ios_base::sync_with_stdio(0);     cin.tie(0);     cout.tie(0);     int t;     cin >> t;     while (t--) {       string s;       cin >> s;       if (!ispal(s)) {         cout << s <<   n ;         ;       } else {         char x = s[0];         bool check = false;         string ans = s;         for (int i = 1; i < s.size(); i++) {           if (x != s[i]) {             check = true;             ans[0] = ans[i];             ans[i] = x;             break;           }         }         if (check) {           cout << ans <<   n ;           ;         } else {           cout << -1 <<   n ;           ;         }       }     }   }   