import java.io.*;
import java.util.*;

class Main138 {
	
	public static boolean check (String[] line1, String[] line2) {
		int[] ver1 = new int[3];
		int[] ver2 = new int[3];
		for (int i = 0; i < ver1.length; i++) {
			ver1[i] = Integer.parseInt(line1[i]);
			ver2[i] = Integer.parseInt(line2[i]);
			int sub = ver1[i] - ver2[i];
			if (sub != 0) return sub > 0;
		}
		return true;
	}
	
	public static void main (String[] args) throws IOException {
		BufferedReader br = 
			new BufferedReader(new InputStreamReader(System.in));
		
		String[] line1 = br.readLine().split("\\.");
		String[] line2 = br.readLine().split("\\.");
		
		System.out.println(check(line1, line2) ? "YES" : "NO");
		
	}
}