package P138;

import java.io.*;
import java.util.Arrays;
import java.util.Scanner;

public class P138 {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String l = sc.next();
		String[] lstrs = l.split("\\.",0);
		String n = sc.next();
		String[] nstrs = n.split("\\.",0);

		int lint[] = new int[10];
		int nint[] = new int[10];
		
		for (int i=0;i<3;i++) {
			lint[i] = Integer.parseInt(lstrs[i]);
			nint[i] = Integer.parseInt(nstrs[i]);
		}
		
		if (lint[0] > nint[0]) {
			System.out.println("YES");
		} else if (lint[0] < nint[0]) {
			System.out.println("NO");
		} else {
			if(lint[1] > nint[1]) {
				System.out.println("YES");
			} else if (lint[1] < nint[1]) {
				System.out.println("NO");
			} else {				
				if(lint[2] >= nint[2]) {
					System.out.println("YES");
				} else {
					System.out.println("NO");
				}
			}
		} 
	}
}