#include<bits/stdc++.h>
#define to edge[i].v
#define mp make_pair
#define rint register int
#define fgx cerr<<"-------------"<<endl
#define N 100
using namespace std;
typedef long long ll;
typedef long double db;
typedef pair<int,int> pii;
void dbg(){cerr<<endl;}
template<typename A,typename... B>void dbg(A x,B... y){cerr<<x<<" ";dbg(y...);}
#define debug(...) cerr<<#__VA_ARGS__<<"=",dbg(__VA_ARGS__)
int a[N],b[N][N],c[N];
int main()
{    int t; cin>>t;
    while(t--)
    {    int n,cur=0,res,win=0; cin>>n; res=n-1;
        for(rint i=1;i<=n;i++) scanf("%d",&a[i]),c[i]=1;
        for(rint i=1;i<=n;i++)
        {    for(rint j=1;j<=n;j++) scanf("%d",&b[i][j]);
            if(a[i]) cur=b[i][1];
        }
        c[cur]=0;
        if(a[cur]){cout<<"lieren\n";continue;}
        while(res>2&&!win)
        {    for(rint i=1;i<=n;i++)
            if(c[b[cur][i]])
            {    cur=b[cur][i];
                if(a[cur]) cout<<"lieren\n",win=1;
                res--,c[cur]=0;
                break;
            }
        }
        if(!win) cout<<"langren\n";
    }
    return 0;
}