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