#include<bits/stdc++.h>
using namespace std;
int main()
{
    int t,n,a[53][53],k[53],ki[53];
    int i,j;
    //cin>>t;
    scanf("%d",&t);
    while(t--)
    {
        //cin>>n;
        scanf("%d",&n);
        memset(ki,0,sizeof(ki));
        int lan;
        for(i=1;i<=n;i++)
        {
            //cin>>k[i];
            scanf("%d",&k[i]);
            if(k[i]==1)    lan=i;
        }
        for(i=1;i<=n;i++)
        {
            for(j=1;j<=n;j++)
            {
                //cin>>a[i][j];
                scanf("%d",&a[i][j]);
            }
        }
        int z=1;
        int kk=lan;
        for(i=1;i<n-1;i++)
        {
            for(j=1;j<=n;++j)
            {
                int num=a[kk][j];
                if(ki[num]==0)
                {
                    if(num==lan)
                    {
                        //cout<<"lieren"<<endl;
                        printf("lieren\n");
                        z=0;
                        break;
                    }
                    kk=num;
                    ki[num]=1;
                    break;
                }
            }
            if(z==0)break;
        }
        if(z)printf("langren\n");
        //cout<<"langren"<<endl;
     } 
}