import java.util.*;
public class Main {
    public static void main(String[] args) throws Exception {
        Scanner koko = new Scanner(System.in);
        int n = koko.nextInt();
        int[][] a = new int[n][4];
        String[] ans = new String[n];
        int[] yes = new int[10];
        int[] no = new int[10];
        int yesc = 0;
        for(int i=0; i<n; i++){
            for(int j=0; j<4; j++){
                a[i][j] = koko.nextInt();
            }
            ans[i] = koko.next();
            if(ans[i].equals("YES")){
                for(int j=0; j<4; j++){
                    yes[a[i][j]]++;
                }
                yesc++;
            }else{
                for(int j=0; j<4; j++){
                    no[a[i][j]]++;
                }
            }
        }
        for(int i=0; i<10; i++){
            if(yes[i]==yesc&&no[i]==0){
                System.out.println(i);
            }
        }
    }
}