#include <iostream>
#include <iomanip>

#include <algorithm>
#include <string>
/////////
#define REP(i, x, n) for(int i = x; i < n; i++)
#define rep(i,n) REP(i,0,n)
#define P(p) cout<<(p)<<endl;
/////////
typedef long long LL;
typedef long double LD;
/////////
using namespace::std;
/////////

int main(void){
	cin.tie(0);
	ios::sync_with_stdio(false);
	cout << fixed;//
	//cout << setprecision(7);//
	

	int N;
	cin >> N;
	int f[10];
	rep(i,10)f[i] = 1;

	int a,b,c,d;
	string str;
	rep(i,N){
		cin>>a>>b>>c>>d>>str;
		if(str == "YES"){
			rep(k,10){
				if( k != a && k != b && k != c && k != d){
					f[k] = 0;
				}
			}
		}else{//"NO"
			f[a]=0;
			f[b]=0;
			f[c]=0;
			f[d]=0;
		}
	}

	rep(i,10){
		if(f[i]>0){
			P(i);
		}
	}
	return 0;
}