#include <bits/stdc++.h>
#define ls(p) (p << 1)
#define rs(p) (p << 1 | 1)
#define For(i,l,r) for (register int i=l; i<=r; i++)
using namespace std;
typedef unsigned long long LL;
typedef signed long long ll;
template <typename T>
inline void read(T &x) {
    char c = getchar(); int w = 1; x = 0;
    while (!isdigit(c))
        (c == '-') && (w = -w), c = getchar();
    while (isdigit(c))
        x = (x << 1) + (x << 3) + (c ^ '0'), c = getchar();
    x *= w;
}

const int N = 55;
int T, n, w[N], a[N][N];
signed main() {
    read(T);
    while (T -- > 0) {
        read(n);
        for (register int i=1; i<=n; ++i) {
            read(w[i]);
        }
        int id;
        for (register int i=1; i<=n; ++i) {
            for (register int j=1; j<=n; ++j) {
                read(a[i][j]);
            }
            if (w[i]) {
                id = a[i][1];
            }
        }
        if (w[id] == 1) {
            puts("lieren"); continue;
        }
        w[id] = -1;
        int now = n-1;
        while (true) {
            if (now <= 2) {
                puts("langren"); break;
            }
            for (register int i=1; i<=n; ++i) {
                if (~w[a[id][i]]) {
                    id = a[id][i]; break;
                }
            }
            if (w[id] == 1) {
                puts("lieren"); break;
            }
            w[id] = -1;
            -- now;
        }
    }
    return 0;
}