#include <cstdio>
#include <cstring>
int live[55];
int st[55];
int tab[55][55];
void solve() {
    int n;
    int id;
    scanf("%d", &n);
    for (int i = 1; i <= n; i++) {
        scanf("%d", &st[i]);
        if (st[i]) id = i;
    }
    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= n; j++) {
            scanf("%d", &tab[i][j]);
        }
    }
    for (int i = 0; i < 55; i++) live[i] = 1;
    int num = n;
    live[tab[id][1]] = 0;
    num--;
    if (id == tab[id][1]) {
        puts("lieren");
        return;
    }
    id = tab[id][1];
    while (1) {
        if (num <= 2) {
            puts("langren");
            return;
        }
        int tar = 1;
        while (1) {
            if (tab[id][tar] != id && live[tab[id][tar]]) break;
            tar++;
        }
        live[tab[id][tar]] = 0;
        num--;
        if (st[tab[id][tar]]) {
            puts("lieren");
            return;
        }
        id = tab[id][tar];
    }
}
int main() {
    int T;
    scanf("%d", &T);
    while (T--) solve();
    return 0;
}