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#include <bits/stdc++.h>
#define ll long long
#define llu long long unsigned
#define ld long double
#define fr(i,n) for(int i=0;i<n;i++)
#define watch(x) cout<<(#x)<<"=="<<(x)<<endl
#define ft first
#define sc second
#define mp make_pair
#define pb push_back
#define vi vector<int>
#define pii pair<int,int>
#define P 1000000007ll
#define N 1000005
#define LC 262144
#define lgM 30ll
#define lgMlgM 35ll
using namespace std;

int getchar_pos_int() {
    int n=0, c=getchar();
    while('0'<=c&&c<='9') {n=n*10+c-'0'; c=getchar();}
    return n;
}

int t, n, k, h;
char s[N];

int main() {
    t=getchar_pos_int();
    while(t--) {
        n=getchar_pos_int(), k=getchar_pos_int(), h=(n+1)/2;
        if (k<h) {puts("NIE"); continue;}
        if (k==1) {puts("PA"); continue;}
        h-=h%2;
        fr(i,h/2) s[i]='P';
        for (int i=h/2;i<k-h/2;i++) s[i]='A';
        for (int i=k-h/2;i<k;i++) s[i]='P';
        for (int i=k;i<n;i++) s[i]='A';
        puts(s);
        fr(i,n) s[i]=0;
    }
    return 0;
}