func_code_string: #include <bits/stdc++.h>   using namespace std;   string s;   int l, t, c, a;   bool vis[26];   bool ok = false;   int main() {     cin >> s;     l = s.size();     if (l < 26) {       cout << -1 << endl;       return 0;     }     for (int i = 0; i < l; ++i) {       memset(vis, 0, sizeof vis);       t = c = 0;       for (int j = i; j < i + 26 && j < l; ++j) {         if (vis[s[j] -  A ]) break;         if (s[j] ==  ? ) {           c++;           continue;         }         vis[s[j] -  A ]++;         t++;       }       if (c + t == 26) {         a = i;         ok = true;         break;       }     }     if (!ok) {       cout << -1 << endl;       return 0;     }     queue<char> q;     for (int j = 0; j < 26; ++j) {       if (!vis[j]) q.push((char)j +  A );     }     for (int i = 0; i < a; ++i)       if (s[i] !=  ? )         cout << s[i];       else         cout <<  A ;     for (int i = a; i < 26 + a; ++i)       if (s[i] !=  ? )         cout << s[i];       else {         cout << q.front();         q.pop();       }     for (int i = 26 + a; i < l; ++i)       if (s[i] !=  ? )         cout << s[i];       else         cout <<  A ;     return 0;   }   