import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class No0024 {
	public static void main(String[] args) {
		try (BufferedReader br = 
				new BufferedReader(new InputStreamReader(System.in))) {
	        int cntTurn = Integer.parseInt(br.readLine());
	        String[] str;
	        int[] num = new int[10];

		    for(int i =0; i < cntTurn ; i++){
		    	str = br.readLine().trim().split(" ");
		    	if(str[str.length - 1].endsWith("NO")){
		    		for(int j = 0; j < str.length - 1; j++){
		    			num[Integer.parseInt(str[j])] = -1;//リセット
		    		}
		    	}
		    	else if(str[str.length - 1].endsWith("YES")){
		    		for(int j = 0; j < str.length - 1; j++){
		    			num[Integer.parseInt(str[j])] += 1;
		    		}
		    	}
		    }
		    int max = 0;
		    for(int n:num){
		    	max = Math.max(max, n);
		    }
		    for(int i = 0; i < num.length ; i++){
		    	if(num[i] == max){
		    		System.out.println(i);
		    	}
		    }
		} catch (IOException e) {
			e.printStackTrace();
		}
    }
}