#include<bits/stdc++.h>

using namespace std;


int main() {
    
    int t;
    cin >> t;
    while(t--){
        
        int n;
        cin >> n;
        int f[55] = {0};
        int d[55] = {0};
        int langren = 0;
        for(int i = 1;i <= n;i++){
            cin >> f[i];
            if(f[i]){
                langren = i;
            }
        }
        
        int m[55][55] = {0};
        for(int i = 1;i <= n;i++){
            for(int j = 1;j <= n;j++){
                cin >> m[i][j];
            }
        }
        int now = langren;
        int len = n;
        while(len > 2){
            
            for(int i = 1;i <= n;i++){
                if(d[m[now][i]] == 0){
                    d[m[now][i]] = 1;
                    now = m[now][i];
                    len--;
                    break;
                }
            }
            
            if(d[langren]){
                break;
            }
        }
        
        if(d[langren]){
            cout << "lieren" << endl;
        }else{
            cout << "langren" << endl;
        }
        
        
        
        
        
    }
    
    
    
    return 0;
}