func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     char str[100005];     cin >> str;     int flag = 0, i;     char checkString[100005];     for (i = 0; str[i] !=   0 ; i++) {       checkString[i] =  a ;     }     checkString[i] =   0 ;     if (strcmp(str, checkString) == 0) {       checkString[strlen(checkString) - 1] =  z ;       cout << checkString;     } else {       for (i = 0; str[i] !=   0 ; i++) {         if (!flag && str[i] ==  a ) continue;         if (flag && str[i] ==  a )           break;         else {           flag = 1;           str[i]--;         }       }       cout << str;     }   }   