func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int q;     cin >> q;     while (q--) {       int n;       cin >> n;       int a[n], i, j, k, l, m;       string s, temp;       for (i = 0; i < n; i++) cin >> a[i];       char c =  a , d;       for (i = 0; i <= 50; i++) {         s +=  a ;       }       cout << s << endl;       for (i = 0; i < n; i++) {         k = a[i];         temp =   0 ;         for (j = 0; j < k; j++) {           temp += s[j];           c = s[j];         }         for (j = k; j <= 50; j++) {           if (s[j] !=  z ) {             d = s[j] + 1;           } else {             d =  a ;           }           temp += d;         }         s = temp;         cout << temp << endl;       }     }     return 0;   }   