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#ifdef LOC
#include "debuglib.hpp"
#else
#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
#define deb(...)
#define DBP(...)
#endif
using namespace std;
using   ll         = long long;
using   vi         = vector<int>;
using   pii        = pair<int, int>;
#define pb           push_back
#define mp           make_pair
#define x            first
#define y            second
#define rep(i, b, e) for (int i = (b); i < (e); i++)
#define each(a, x)   for (auto& a : (x))
#define all(x)       (x).begin(), (x).end()
#define sz(x)        int((x).size())

vector<vector<string>> small = {
	{"A"},
	{"PA", "AA"},
	{"NIE", "PAA", "AAA"},
	{"NIE", "PPAA", "PAAA", "AAAA"},
	{"NIE", "NIE", "APAAA", "PAAAA", "AAAAA"},
	{"NIE", "NIE", "PAPAAA", "APAAAA", "PAAAAA", "AAAAAA"},
	{"NIE", "NIE", "PPAPAAA", "PAPAAAA", "APAAAAA", "PAAAAAA", "AAAAAAA"},
	{"NIE", "NIE", "PPPAPAAA", "PPAPAAAA", "AAPAAAAA", "APAAAAAA", "PAAAAAAA", "AAAAAAAA"},
};

int main() {
	cin.sync_with_stdio(0); cin.tie(0);
	int t; cin >> t;
	while (t--) {
		int n, k;
		cin >> n >> k;
		if (n <= 8) {
			cout << small[n-1][k-1] << '\n';
		} else if (k < 4) {
			cout << "NIE\n";
		} else {
			rep(i, 0, k) cout << "A";
			rep(i, 0, n-k) cout << "PPAPAA"[i%6];
			cout << '\n';
		}
	}
}