//{{{
#include <bits/stdc++.h>
using namespace std;
#define rep(...) repN((__VA_ARGS__,rep3,rep2,loop,~))(__VA_ARGS__)
#define loop(n) rep2(_loop_,n)
#define rep2(i,n) rep3(i,0,n)
#define rep3(i,begin,end) for(int i=(int)(begin),i##_end=(int)(end);i<i##_end;++i)
#define repN(a) repX a
#define repX(a0,a1,a2,x,...) x
typedef long long ll;
const int MOD = 1e9+7;
//}}}

int num[10];
int main(){
	int N;
	cin >> N;
	rep(i, N){
		int a, b, c, d;
		string r;
		cin >> a >> b >> c >> d >> r;
		if(r == "NO"){
			num[a] |= 1;
			num[b] |= 1;
			num[c] |= 1;
			num[d] |= 1;
		}else{
			int tmp[10] = {0};
			tmp[a] = 1;
			tmp[b] = 1;
			tmp[c] = 1;
			tmp[d] = 1;
			rep(j, 10){
				num[j] |= 1 - tmp[j];
			}
		}
	}
	rep(i, 10){
		if(!num[i]) printf("%d\n", i);
	}
	return 0;
}