import java.util.*;

public class Main {
    public static int mark = 0;
    public static void main(String[] args) {
        Scanner r = new Scanner(System.in);
        int T = r.nextInt();
        for (int i=0; i<T; i++) {
            int num = r.nextInt();
            int live = num;
            int lang = 0;
            int[] ident = new int[num+1];
            boolean[] death = new boolean[num+1];
            LinkedList<Integer>[] kill = new LinkedList[num+1];
            for (int j=1; j<=num; j++){
                ident[j] = r.nextInt();
                death[j] = false;
                if(lang==0&&ident[j]==1){
                    lang = j;
                }
                kill[j] = new LinkedList<>();
            }
            mark = lang;
            for (int j=1; j<=num; j++){
                for (int k=1; k<=num; k++){
                    kill[j].add(r.nextInt());
                }
            }
            int killWho = 0;
            for(int t:kill[lang]){
                killWho = t;
                break;
            }
            live--;
            if(killWho==lang){
                System.out.println("lieren");
                continue;
            }
            else{
                death[killWho] = true;
                judge(killWho,live,death,kill);
            }
        }
    }
    static void judge(int num, int live, boolean[] death, LinkedList<Integer>[] kill){
        if(live<=2){
            System.out.println("langren");
            return;
        }
        for(int select:kill[num]){
            if(!death[select]){
                if(select==mark){
                    System.out.println("lieren");
                    return;
                }
                else{
                    death[select] = true;
                    live--;
                    judge(select,live,death,kill);
                }
                break;
            }
        }
    }
}