func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int i, j, n, arr[26];     string s;     memset(&arr, -1, sizeof(arr));     cin >> s;     int l = s.length();     if (l < 26) {       cout << -1;       return 0;     }     i = 0;     j = 0;     while (j < l) {       if (j - i == 26) break;       if (s[j] ==  ? )         j++;       else if (arr[s[j] -  A ] != -1) {         int temp = i;         i = arr[s[j] -  A ] + 1;         for (; temp < i; temp++)           if (s[temp] !=  ? ) arr[s[temp] -  A ] = -1;       } else if (s[j] !=  ?  && arr[s[j] -  A ] == -1) {         arr[s[j] -  A ] = j;         j++;       }     }     if (j - i == 26) {       int temp = i, temp2;       for (temp2 = 0; temp2 < 26; temp2++) {         if (arr[temp2] == -1) {           while (s[temp] !=  ?  && temp < j) temp++;           s[temp] =  A  + temp2;         }       }       while (i--) {         if (s[i] ==  ? ) s[i] = s[i + 26];       }       while (j < l) {         if (s[j] ==  ? ) s[j] = s[j - 26];         j++;       }       cout << s;     } else       cout << -1;     return 0;   }   