#include <bits/stdc++.h>
using namespace std;

const int N = 55;
int t, n, m, tmp, a[N][N];
bool vis[N];

int read() {
    int x = 0, p = 1;
    char c = getchar();
    for (; !isdigit(c); c = getchar())
        if (c == '-') p = -1;
    for (; isdigit(c); c = getchar())
        x = (x << 3) + (x << 1) + (c & 15);
    return x * p;
}

int main() {
    t = read();
    while (t--) {
        n = read();
        for (int i = 1; i <= n; i++) {
            if (read()) m = i;
            vis[i] = 0;
        }
        for (int i = 1; i <= n; i++)
            for (int j = 1; j <= n; j++)
                a[i][j] = read();
        tmp = m;
        for (int i = 1; i <= n - 2; i++) {
            for (int j = 1; j <= n; j++) {
                if (vis[a[tmp][j]]) continue;
                vis[a[tmp][j]] = 1;
                tmp = a[tmp][j];
                break;
            }
            if (tmp == m) break;
        }
        if (tmp == m) puts("lieren");
        else puts("langren");
    }
    return 0;
}