import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int [] a = new int [N];
        int [] b = new int [N];
        int [] c = new int [N];
        int [] d = new int [N];
        String [] arr = new String [N];
        int [] flag = new int [10];
        for(int i=0; i<N; i++){
            a[i] = sc.nextInt();
            b[i] = sc.nextInt();
            c[i] = sc.nextInt();
            d[i] = sc.nextInt();
            arr[i] = sc.next();
            if( "NO".equals(arr[i]) ){
                flag[ a[i] ]=1;
                flag[ b[i] ]=1;
                flag[ c[i] ]=1;
                flag[ d[i] ]=1;
            }else{
                for(int j=0; j<10; j++){
                    if(j!=a[i] && j!=b[i] && j!=c[i] && j!=d[i]){
                        flag[j]=1;
                    }
                }
            }
        }
        for(int i=0; i<10; i++){
            if(flag[i]==0){
                System.out.println(i);
            }
        }
    }
}