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#include <iostream>
#include <vector>
#include <algorithm>
#include <cmath>

using namespace std;

int kk;

int get_max_palindrom(const vector<bool>& data, int len)
{
	int maxi = 1;

	for (int i = 0; i < len; ++i)
	{
		int l = i - 1;
		int r = i + 1;

		while (1)
		{
			//nieparzyste
			if (l >= 0 && r < len)
			{
				if (data[l] == data[r])
				{
					maxi = max(maxi, r - l + 1);
				}
				else
				{
					break;
				}
			}
			else
			{
				break;
			}

			--l;
			++r;
		}

		//parzyste
		l = i;
		r = i + 1;

		while (1)
		{
			if (l >= 0 && r < len)
			{
				if (data[l] == data[r])
				{
					maxi = max(maxi, r - l + 1);
				}
				else
				{
					break;
				}
			}
			else
			{
				break;
			}

			--l;
			++r;
		}
	}

	return maxi;
}

vector<bool> result(30);

void write(const vector<bool>& data, int len)
{
	for (int i = 0; i < len; ++i)
	{
		if (data[i])cout << 'P';
		else cout << 'A';
	}
	cout << '\n';
}


bool isWin;

void backtrack(int len, int idx = 0)
{
	if (isWin) return;

	if (idx == len)
	{
		if (kk == get_max_palindrom(result, len))
		{
			isWin = true;
			write(result, len);
		}
		return;
	}

	result[idx] = 0;
	backtrack(len, idx + 1);

	result[idx] = 1;
	backtrack(len, idx + 1);
}

int main()
{
	cin.tie(0);
	ios::sync_with_stdio(0);

	int t;
	cin >> t;
	int n, k;

	while (t--)
	{
		cin >> n >> k;
		isWin = false;

		kk = k;

		if (k == 1)
		{
			if (n == 1)cout << "A\n";
			else if (n == 2)cout << "AP\n";
			else cout << "NIE\n";
		}
		else if (k == 2)
		{
			if (n >= 2 && n <= 4)
			{
				backtrack(n);
			}
			else cout << "NIE\n";
		}
		else if (k == 3)
		{
			if (n >= 3 && n <= 8)
			{
				backtrack(n);
			}
			else cout << "NIE\n";
		}
		else
		{
			//k*A + PPAPAA
			string pattern = "PPAPAA";

			string res(k, 'A');
			
			int remain = n - k;

			for (int i = 0; i < remain; ++i)
			{
				res += pattern[i % 6];
			}

			cout << res << "\n";
		}
	}
}