#include <bits/stdc++.h>   using namespace std;   const int N = 2e5 + 2, M = 1e9 + 7;   int tt = 1, n, k;   int main() {     ios_base::sync_with_stdio(0);     cin.tie(0);     cin >> tt;     while (tt--) {       cin >> n;       if (n == 1) {         cout <<  a n ;         continue;       }       string second =   , ans =   ;       for (int i = 0; i < n / 2 - 1; i++) second +=  a ;       ans +=  a  + second +  b  + second;       if (n & 1) ans +=  c ;       cout << ans <<   n ;     }     return 0;   }   