#include<bits/stdc++.h>
using namespace std;
const int M=55;
int n;
int A[M][M],cnt[M],lr;
bool mark[M],sf[M];
int main(){
    int T;
    scanf("%d",&T);
    while(T--){
        scanf("%d",&n);
        for(int i=1;i<=n;i++){
            scanf("%d",&sf[i]);
            if(sf[i])lr=i;
        }
        for(int i=1;i<=n;i++){
            cnt[i]=0;
            mark[i]=0;
            for(int j=1;j<=n;j++){
                scanf("%d",&A[i][j]);
            }
        }
        int tot=n;
        bool f=1;
        while(f){
            while(mark[A[lr][++cnt[lr]]]);
            int si=A[lr][cnt[lr]];
            mark[si]=1;
            if(si==lr){
                printf("lieren\n");
                f=0;
                break;
            }
            tot--;
            while(f){
                if(tot<=2){
                    printf("langren\n");
                    f=0;
                    break;
                }
                while(mark[A[si][++cnt[si]]]);
                int sha=A[si][cnt[si]];
                mark[sha]=1;
                tot--;
                if(sha==lr){
                    printf("lieren\n");
                    f=0;
                    break;
                }
                si=sha;
            }
        }
    }
    return 0;
}