#include <bits/stdc++.h>
using namespace std;

signed main(){
  int N; cin >> N;
  vector< int > cnt( 10 );
  for( int i = 0; i < N; ++i ){
    int A, B, C, D; string R; cin >> A >> B >> C >> D >> R;
    if( R == "NO" ) continue;
    ++cnt[ A ], ++cnt[ B ], ++cnt[ C ], ++cnt[ D ];
  }
  for( int i = 0; i < 10; ++i )
    if( cnt[ i ] == N )
      cout  << i << endl;
  return 0;
}