func_code_string: #include <bits/stdc++.h>   using namespace std;   bool flag = 0, flag1 = 0, flag2 = 0;   string t =  abacaba ;   int check(string s) {     long long int x = 0;     for (long long int i = 0; i < s.size(); i++) {       if (s.substr(i, 7) == t) {         x++;       }     }     return x;   }   int main() {     ios::sync_with_stdio(0);     cin.tie(0);     cout.tie(0);     long long int tt = 1;     cin >> tt;     while (tt--) {       long long int n;       cin >> n;       string s;       cin >> s;       long long int ans = 0;       ans = check(s);       if (ans == 0) {         for (long long int i = 0; i < n - 6; i++) {           if (s[i] == t[0] || s[i] ==  ? ) {             flag = 0;             for (long long int j = 0; j < 7; j++) {               if (s[j + i] != t[j] && s[i + j] !=  ? ) {                 flag = 1;                 break;               }             }             if (flag == 0) {               string temp = s;               for (long long int j = 0; j < 7; j++) temp[i + j] = t[j];               if (check(temp) == 1) {                 ans++;                 s = temp;                 break;               }             }           }         }       }       if (ans == 1) {         cout <<  Yes n ;         for (long long int i = 0; i < s.size(); i++) {           if (s[i] ==  ? )             cout <<  d ;           else             cout << s[i];         }         cout <<   n ;       } else         cout <<  No n ;     }   }   