#include <bits/stdc++.h>

using namespace std;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int t;
  cin >> t;
  while (t--) {
    int n;
    cin >> n;
    vector<int> id(n);
    int wolf = -1;
    for (int i = 0; i < n; i++) {
      cin >> id[i];
      if (id[i]) wolf = i;
    }
    vector<vector<int>> kill(n, vector<int>(n));
    for (int i = 0; i < n; i++) {
      for (int j = 0; j < n; j++) {
        cin >> kill[i][j];
        kill[i][j]--;
      }
    }
    vector<bool> live(n, 1);
    int dead = kill[wolf][0];
    live[dead] = 0;
    int alive = n - 1;
    while (live[wolf] and alive > 2) {
      //cout << dead << '\n';
      for (int i = 0; i < n; i++) {
        if (live[kill[dead][i]]) {
          live[kill[dead][i]] = 0;
          dead = kill[dead][i];
          alive--;
          break;
        }
      }
    }
    if (live[wolf]) cout << "langren" << '\n';
    else cout << "lieren" << '\n';
  }
  return 0;
}