import java.util.*;

public class Main {
    @SuppressWarnings("resource")
    public static void main(String[] args) {
        Scanner read = new Scanner(System.in);
        int T = read.nextInt();
        List<Integer> sur = new LinkedList<Integer>();
        for (int i = 0; i < T; i++) {
            int num = read.nextInt();
            int[][] list = new int[num][num];
            int lang = -1;
            for (int j = 0; j < num; j++) {
                if (read.nextInt() == 1) {
                    lang = j;
                }
                sur.add(j + 1);
            }
            for (int j = 0; j < num; j++) {
                for (int k = 0; k < num; k++) {
                    list[j][k] = read.nextInt();
                }
            }
            int dead = list[lang][0];
            e1: for (int j = 0; j < num; j++) {
                if (dead - 1 == lang) {
                    System.out.println("lieren");
                    sur.removeAll(sur);
                    break e1;
                }
                sur.remove((Integer) dead);
                if (sur.size() == 2) {
                    System.out.println("langren");
                    sur.removeAll(sur);
                    break e1;
                }
                for (int k = 0; k < num; k++) {
                    if (sur.contains((Integer) list[dead - 1][k])) {
                        dead = list[dead - 1][k];
                        break;
                    }
                }
                
            }
        }
    }
}