#include <iostream>
#include <algorithm>
#include <vector>
using namespace std;

int n, m, peo[100]={0}, tes, poi, dea, tar;

vector <int> cmd[60], alive;
vector<int>::iterator result, tar2;

int c(){
  for(int i=0; i<55; i++){
  
    cmd[i].clear();
  }

  return 0;
}

int main() {
  cin >> n;

  for(int i=0; i<n; i++){
    c();
    alive.clear();

    cin >> m;
    for(int j=0; j<m; j++){
      cin >> peo[j];
      if(peo[j]) poi=j;
    }
    for(int j=0; j<m; j++) alive.push_back(j+1);

    for(int j=0; j<m; j++)
      for(int k=0; k<m; k++){
        cin >> tes;
        cmd[j].push_back(tes);
      }


    
    result=find(alive.begin(), alive.end(), cmd[poi][0]);
    alive.erase(result);
    //poi=cmd[poi]=0;

    //if()


    //cout << *alive.end();
    //if(find(alive.begin(), alive.end(), 87)==alive.end()) cout << "GGGG";
    
    //return 0;
    dea=cmd[poi][0]-1;

    //cout << alive.size() << '\n';


    while(1){
      if(alive.size()<=2 || (find(alive.begin(), alive.end(), (poi+1))==alive.end())){
        break;
      }

      

      for(vector<int>::iterator it=cmd[dea].begin(); it!=cmd[dea].end(); it++){
        tes=*it;
        //cout << tes << '\n';
        if(find(alive.begin(), alive.end(), tes)!=alive.end()){
          tar2=find(alive.begin(), alive.end(), tes);
          tar=*it;
          break;
        }
      }

      //cout << dea << ' ' << tar << '\n';

      //cout << *tar2 << '\n';
      alive.erase(tar2);

      dea=tar-1;

      

    }
    
    /*
    for(int i=0; i<m; i++){
      for(int j=0; j<m; j++){
        cout << cmd[i][j];
      }
      cout << '\n';
    }
    */
    

    if(find(alive.begin(), alive.end(), poi+1)!=alive.end()){
      cout << "langren\n";
    }
    else cout << "lieren\n";

  }




  return 0;
}