#include<iostream>
#include<string>
using namespace std;

int yeslist[10];
int nolist[10];
int cnt;

int main(){
  int N;
  cin>>N;
  for(int i=0;i<N;i++){
    int a,b,c,d;
    string str;
    cin>>a>>b>>c>>d>>str;
    if(str == "YES"){
      cnt++;
      yeslist[a]++;
      yeslist[b]++;
      yeslist[c]++;
      yeslist[d]++;
    }else{
      nolist[a] |= 1;
      nolist[b] |= 1;
      nolist[c] |= 1;
      nolist[d] |= 1;
    }
  }
  for(int i=0;i<10;i++){
    if(yeslist[i] == cnt && !nolist[i]){
      cout<<i<<endl;
    }
  }
  return 0;
}