import java.util.*;

public class Main {
	static Scanner sc = new Scanner(System.in);
	public static void main(String[] args) {
		String[] a = sc.nextLine().split("\\.");
		String[] b = sc.nextLine().split("\\.");
		int[] x = new int[3];
		int[] y = new int[3];
		for (int i=0; i<3; i++) {
			x[i] = Integer.parseInt(a[i]);
			y[i] = Integer.parseInt(b[i]);
		}
		
		boolean isOld = true;
		if (y[0] > x[0]) {isOld = false;}
		else {
			if (y[1] > x[1]) {isOld = false;}
			else {
				if (y[2] > x[2]) {isOld = false;}
			}
		}
		
		System.out.println(isOld==true?"YES":"NO");
	}
}