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#include <bits/stdc++.h>
#define FOR(i,p,k) for(int i=(p);i<=(k);++i)
#define REP(i,n) FOR(i,0,(n)-1)
#define RFOR(i,p,n) for(int i=(p);i>=(n);--i)
#define all(x) (x).begin(),(x).end()
#define rall(x) (x).rbegin(),(x).rend()
#define ssize(x) int((x).size())
#define fi first
#define se second
#define V vector
#define pb push_back
#define eb emplace_back
#define C const
#define pn printf("\n")
using namespace std;
typedef long long ll;
typedef __int128_t lll;
typedef V<int> vi;
typedef V<ll> vll;
typedef const int ci;
typedef const ll cll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef pair<ll, int> pli;
typedef pair<int, ll> pil;
void chmin(auto &a, auto b){a=min(a,b);}
void chmax(auto &a, auto b){a=max(a,b);}
ci inf = 2.1e9;
cll infll = 4.5e18;
int I(){
    int z;
    scanf("%d", &z);
    return z;
}
ll LL(){
    ll z;
    scanf("%lld", &z);
    return z;
}

void answer(){
    ci n = I();
    ci k = I();

    auto nie = [&](){
        printf("NIE\n");
    };
    auto tak = [&](vi a){
        for(ci x : a) printf(x ? "P" : "A");
        pn;
    };

    if(k < 4){
        if(n <= 8) REP(maska, 1<<n){
            vi a(n);
            REP(i, n) a[i] = maska>>i&1;
            int maks = 0;
            REP(kon, n) FOR(poc, 0, kon){
                bool pal = true;
                FOR(i, poc, kon) pal &= a[i]==a[poc+kon-i];
                if(pal) chmax(maks, kon-poc+1);
            }
            if(maks == k) return tak(a);
        }
        return nie();
    }

    vi a(n, 0);
    vi pat = {1, 0, 1, 1, 0, 0};
    FOR(i, k, n-1) a[i] = pat[(i-k)%ssize(pat)];
    tak(a);
}

int main(){
    int tt = I();
    while(tt--) answer();
}