func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     string s;     cin >> s;     int n = s.length();     bool sign = false;     for (int i = 0; i < n; i++) {       if (s[i] ==  a  && !sign) continue;       if (s[i] ==  a  && sign) break;       s[i]--;       sign = true;     }     if (!sign) s[n - 1] =  z ;     cout << s <<   n ;   }   