#include <bits/stdc++.h>
using namespace std;
//#define int long long
#define sc(x) scanf("%d",&(x));
#define pb push_back
#define fi first
#define se second

#define maxn  5000000



int t;

int A[55][55];
bool vis[55];
signed main()
{
    sc(t)

    int op, x;
    int n;
    int id = -1;
    while(t--)
    {
        id = -1;
        sc(n)

        for(int i = 1; i <= n; i++)
        {
            sc(x)
            if(x == 1)
            {
                id = i;
            }
            vis[i] = 0;
        }
        for(int i = 1; i <= n; i++)
        {
            for(int j = 1; j <= n; j++)
            {
                sc(A[i][j])
            }
        }
        int k = n-1;
        int x = id;
        while(true)
        {

            //int val = -1;
            int y = -1;
            if(x == id)
            {
                y = A[x][1];
            }
            else
            {
                for(int i = 1; i <= n; i++)
                {
                    if((!vis[A[x][i]])&&(A[x][i] != x) )
                    {

                        y = A[x][i];
                        break;
                    }
                }
            }
            if(y == id)
            {
                cout << "lieren\n";
                break;
            }

            //cout << y << '\n';

            vis[y] = 1;
            x = y;
            k--;
             if(k == 1)
            {
                cout << "langren\n";
                break;
            }

        }

    }
}