func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios_base::sync_with_stdio(0);     string x;     cin >> x;     string y = x;     for (int i = 0; i < x.length(); i++) {       if (x[i] ==  a ) continue;       for (int j = i; j < x.length(); j++) {         if (x[j] ==  a ) break;         x[j] = char(int(x[j]) - 1);       }       break;     }     if (y == x) {       x[x.length() - 1] =  z ;     }     cout << x <<   n ;     return 0;   }   