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#include <iostream>

using namespace std;
const string BLOCK = "AAPAPP";
const string K3_BASE = "AAAPAPPP";

int main()
{
	ios::sync_with_stdio(false);
	cin.tie(nullptr);

	int t; cin >> t;
	while (t--)
	{
		int n, k;
		cin >> n >> k;

		if (k == 1)
		{
			if (n == 1) cout << "A" << endl;
			else if (n == 2) cout << "AP" << endl;
			else cout << "NIE" << endl;
			continue;
		}
		if (k == 2)
		{
			if (n == 2) cout << "AA" << endl;
			else if (n == 3) cout << "AAP" << endl;
			else if (n == 4) cout << "AAPP" << endl;
			else cout << "NIE" << endl;
			continue;
		}
		if (k == 3)
		{
			if (n<=8) cout<<K3_BASE.substr(0, n)<<endl;
			else cout << "NIE" << endl;
			continue;
		}

		string ans;
		ans.reserve(n);
		ans.append(k - 2, 'A');

		while (ans.size() < n)
		{
			int need = n - ans.size();
			ans += BLOCK.substr(0, min(need, (int)BLOCK.size()));
		}
		cout << ans << endl;
	}

	return 0;
}