#include <bits/stdc++.h>
using namespace std;
 
#define co(n) cout<<n<<endl;
const double eps=1e-10,pi=3.1415926535898;
const int mod=1e9+7,maxn=51;
int T,n,m,k,x,y,a[maxn][maxn],vis[maxn];
 
int main(int argc, char const *argv[]) {
    //init();
    T = 1;
    scanf("%d", &T);
    for (int _=1;_<=T;++_) {
        memset(vis, 0, sizeof(vis));
        long long ans=0;
        scanf("%d", &n);
        for (int i=1;i<=n;++i) {
            scanf("%d", &m);
            if (m == 1) x = i;
        }
        for (int i=1;i<=n;++i) {
            for (int j=1;j<=n;++j) {
                scanf("%d", &a[i][j]);
            }
        } 
        k = n;
        y = x;
        while (k > 2) {
            for (int i=1;i<=n;++i) {
                if (!vis[a[y][i]]) {
                    vis[a[y][i]] = 1;
                    //printf("%d %d %d\n", k, y, i);
                    y = a[y][i];
                    //printf("%d %d %d\n", k, y, i);
                    break;
                }
            }
            if (y == x) {
                break;
            }
            --k;
        }
        if (k <= 2) puts("langren");
        else puts("lieren");
    }
    return 0;
}
 
/*
#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,fma")
#pragma GCC optimize("unroll-loops")
clock_t clk;
clk = clock();
if(clock() - clk > CLOCKS_PER_SEC * 0.9) 
      T
W     L
A C M E R
  E L   E
    E
*/