// author: xay5421
// created: Sat Jul 31 14:30:02 2021
#include<bits/stdc++.h>
#define rep(i,a,b) for(int i=(a);i<=(b);++i)
#define per(i,a,b) for(int i=(a);i>=(b);--i)
using namespace std;
const int N=55;
int T,n,mp[N][N];
bool is[N],die[N];
int main(){
#ifdef xay5421
    freopen("a.in","r",stdin);
#endif
    scanf("%d",&T);
    while(T--){
        scanf("%d",&n);
        rep(i,1,n)die[i]=0;
        int wolf=-1;
        rep(i,1,n){
            int x;
            scanf("%d",&x);
            is[i]=x;
            if(is[i])wolf=i;
        }
        rep(i,1,n)rep(j,1,n)scanf("%d",&mp[i][j]);
        int rem=n,who=mp[wolf][1];
        while(1){
            if(rem<=2){
                puts("langren");
                break;
            }
            if(is[who]){
                puts("lieren");
                break;
            }
            die[who]=1,--rem;
            rep(i,1,n)if(!die[mp[who][i]]){
                who=mp[who][i];
                break;
            }
        }
    }
    return 0;
}