#include<cstring>
#include<iostream>
#include<cstdio>
#include<algorithm>
using namespace std;
const int N = 55;
bool lang[N];
int list[N][N];
bool died[N];
int n;

int main(){
    int T;
    int i, j, lasti;
    cin>>T;
    while(T--){
        memset(died, 0, sizeof died);
        scanf("%d",&n);
        int num = n;
        for(i=1;i<=n;i++){
            scanf("%d", &j);
            if(j) lang[i] = 1,lasti = i;
            else lang[i] = 0;
        }
        for(i=1;i<=n;i++)
            for(j=1;j<=n;j++)
                scanf("%d", &list[i][j]);
        j = lasti;
        while(num > 2){
            for(i=1;i<=n && died[list[j][i]];i++);
            if(lang[list[j][i]]) break;
// cout<<" "<<list[j][i]<<endl;
            died[list[j][i]] = 1;
            num--;
            j = list[j][i];
        }
        puts(num>2?"lieren":"langren");
    }
}