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

int main(){
  int n;
  cin >> n;

  
  int a[n][4];
  string s[n];
  int i, j;
  for(i=0;i<n;i++){
    for(j=0;j<4;j++){
      cin >> a[i][j];
    }
    cin >> s[i];
  }

  
  
  int check[10];
  for(i=0;i<10;i++)
    check[i] = 1;

  for(i=0;i<n;i++){
    for(j=0;j<4;j++){
      if(s[i] == "NO"){
	check[ a[i][j] ] = -1;
      }else{
	check[ a[i][j] ] *= 2;
      }
    }
  }


  
  int max = -1145;
  int index = -3;
  for(i=0;i<10;i++){
    if(max < check[i]){
      max = check[i];
      index = i;
    }
  }
    
  cout << index << endl;

  return 0;
}