#include<bits/stdc++.h>
using namespace  std;
int a[55][55];
int id[55];
bool live[55];
int main() {
  //  memset(c, 0, sizeof c);
    int t;
    scanf("%d", &t);

    while(t--){
        int n;
        scanf("%d", &n);

        int s;
        for(int i = 1; i <= n; ++i){
            scanf("%d", id + i);
            live[i] = true;
            if(id[i] == 1) s = i;
        }
        for(int i = 1; i <= n; ++i){
            for(int j = 1; j <= n; ++j){
                scanf("%d", &a[i][j]);
            }
        }
        int tot = n;
        while(true){
            int dead = -1;
            for(int i = 1; i <= n; ++i){
                if(live[a[s][i]]){
                    live[a[s][i]] = false;
                    dead = a[s][i];
                    tot--;
                    break;
                }
            }
            if(!live[s]){
                printf("lieren\n");
                break;
            }
            if(tot <= 2){
                printf("langren\n");
                break;
            }
            bool ok = false;
            while(true){
                for(int i = 1; i <= n; ++i){
                    if(live[a[dead][i]]){
                        live[a[dead][i]] = false;
                        dead = a[dead][i];
                        tot--;
                        break;
                    }
                }
                if(!live[s]){
                    printf("lieren\n");
                    ok = true;
                    break;
                }
                if(tot <= 2){
                    printf("langren\n");
                    ok = true;
                    break;
                }
            }
            if(ok) break;
        }
    }
    return 0;
}
// 12 33