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#include <cmath>
#include <string>
using namespace std;

#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define REP(i,n) FOR(i,0,n)
#define PB push_back
#define SIZE(c) ((int)(c).size())
#define INT(x) int x; scanf("%d", &x)

const char a[] = "PAPPAA";

int check(const string& s) {
	int n = SIZE(s);
	int r = 0;
	REP(i,n) FOR(j,i+1,n+1) {
		bool ok = 1;
		FOR(k,i,j) if (s[k] != s[i + j - k - 1]) {
			ok = 0;
			break;
		}
		if (ok) r = max(r, j - i);
	}
	return r;
}

string small(int n, int k) {
	int n2 = 1 << n;
	REP(m,n2) {
		string s;
		REP(i,n) s.PB(m & (1 << i) ? 'P' : 'A');
		if (check(s) == k) return s;
	}
	return "NIE";
}

void oneCase() {
	INT(n);
	INT(k);
	if (n < 9) {
		printf("%s\n", small(n, k).c_str());
		return;
	}
	if (k < 4) {
		printf("NIE\n");
		return;
	}
	REP(i,k) putchar('A');
	REP(i,n-k) putchar(a[i % 6]);
	putchar('\n');
}

int main() {
	INT(t);
	REP(tt,t) oneCase();
}