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#include <bits/stdc++.h>

using namespace std;

int main() {
  int t; cin >> t;

  while (t--) {
    int n, k; cin >> n >> k;

    if (n > k * 2) {
      cout << "NIE\n";
      continue;
    }

    for (int i = 0; i < k; i++) {
      cout << "A";
    }
    for (int i = 0; i < n - k; i ++) {
      cout << "P";
    }
    cout << "\n";
  }
}