import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        int[] ids = new int[55];
        int[][] toKills = new int[55][55];
        Scanner scanner = new Scanner(System.in);
        int T = scanner.nextInt();
        while (scanner.hasNext()){
            int n = scanner.nextInt();
            for (int i = 0; i < n; i++) {
                ids[i]=scanner.nextInt();
            }
            for (int i = 0; i < n; i++) {
                for (int j = 0; j < n; j++) {
                    toKills[i][j] = scanner.nextInt();
                }
            }
            System.out.println(getResult(ids,toKills,n));
            T--;
        }
        scanner.close();
    }

    public static String getResult(int[] ids,int[][] toKills,int n){
        int lrId = -1;
        int[] death = new int[n+1];
        for (int i = 0; i < n; i++) {
            if(ids[i]==1){
                lrId=i+1;
            }
        }
        int live = n-1;
        int curDeathId = toKills[lrId-1][0];
        if(curDeathId==lrId){
            return "lieren";
        }
        death[curDeathId]=1;
        while (live>2){
            int nextDeathId = 0;
            for (int i = 0; i < n; i++) {
                nextDeathId = toKills[curDeathId-1][i];
                if(death[nextDeathId]==0){
                    death[nextDeathId] = 1;
                    break;
                }
            }
            if(nextDeathId==lrId){
                return "lieren";
            }
            curDeathId = nextDeathId;
            live--;
        }
        return "langren";
    }
}