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#include <bits/stdc++.h>
#define endl '\n'

using namespace std;

string s1 = "AP";
string s2 = "AAPPP";
string s3 = "AAAPAPPP";
string s = "PAPPAA";

void test_case() {
   int n, k;
   cin >> n >> k;
   // cerr << n << ' ' << k << ' ';

   if (k < 4) {
      if ((k == 1 && n > 2) || (k == 2 && n > 4) || (k == 3 && n > 8)) {
         cout << "NIE" << endl;
         return;
      }
      if (k == 1) cout << s1.substr(0, n);
      if (k == 2) cout << s2.substr(0, n);
      if (k == 3) cout << s3.substr(0, n);
      cout << endl;
      return;
   }
   
   for (int i = 0; i < k; i++){
      cout << 'A';
   }

   for (int i = 0; i < n - k; i++) {
      cout << s[i % 6];
   }
   cout << endl;
}

int main() {
   ios_base::sync_with_stdio(false);
   cin.tie(nullptr);

   int q; cin >> q;
   while (q--) {
      test_case();
   }

   return 0;
}