#include<bits/stdc++.h>
using namespace std;
int t,s,x,n,i,j,a[55],p[55][55];
bool b[55],g;
int main()
{
    scanf("%d",&t);
    while(t--)
    {
        scanf("%d",&n);
        memset(b,0,sizeof(b));
        for(i=1;i<=n;i++)scanf("%d",a+i);
        for(i=1;i<=n;i++)for(j=1;j<=n;j++)scanf("%d",p[i]+j);
        for(s=1;s<=n;s++)if(a[s])break;
        for(x=p[s][1],i=1;;i++)
        {
            if(x==s)
            {
                g=1;
                break;
            }
            if(n-i<=2)
            {
                g=0;
                break;
            }
            b[x]=1;
            for(j=1;j<=n;j++)if(!b[p[x][j]])break;
            x=p[x][j];
        }
        if(g)puts("lieren");
        else puts("langren");
    }
    return 0;
}