func_code_string: #include <bits/stdc++.h>   using namespace std;   long long int power(long long int x, long long int y, long long int p) {     long long int res = 1;     x = x % p;     while (y > 0) {       if (y & 1) res = (res * x) % p;       y = y >> 1;       x = (x * x) % p;     }     return res;   }   long long int modInverse(long long int n, long long int p) {     return power(n, p - 2, p) % p;   }   void solve() {     long long int n;     cin >> n;     long long int a[n];     for (long long int i = 0; i < n; i++) cin >> a[i];     string s =   , s1 =   , s2 =   ;     for (long long int i = 0; i < 200; i++) {       s +=  a ;       s1 +=  b ;       s2 +=  a ;     }     cout << s <<   n ;     for (long long int i = 0; i < n; i++) {       if (s[a[i]] ==  a ) {         s = s.substr(0, a[i]) + s1.substr(0, 200 - a[i]);       } else {         s = s.substr(0, a[i]) + s2.substr(0, 200 - a[i]);       }       cout << s <<   n ;     }   }   int32_t main() {     ios_base::sync_with_stdio(false);     cin.tie(0);     cout.tie(0);     long long int t;     cin >> t;     while (t--) solve();     return 0;   }   