#include <bits/stdc++.h>
#define int long long
using namespace std;
/*
        OBSERVATIONS:



*/
signed main()
{
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int t;
    cin >> t;
    while (t--)
    {
        int k;
        cin >> k;
        int as = 1;
        int curr = 0;
        bool a_turn = true;
        bool is_a = true;
        while (true)
        {
            if (a_turn)
            {
                a_turn = false;
                curr += as;
                as++;
                if (curr >= k)
                {
                    break;
                }
            }
            else
            {
                curr++;
                if (curr == k)
                {
                    is_a = false;
                    break;
                }
                a_turn = 1;
            }
        }
        if (is_a)
            cout << 'a' << endl;
        else
            cout << 'b' << endl;
    }
    return 0;
}