import java.util.Scanner;

class No_138 {
	public static void main(String args[]) {
		Scanner stdIn = new Scanner(System.in);		

		String[] old_ver = stdIn.next().split("\\.");
		String[] ver = stdIn.next().split("\\.");

		for (int i = 0; i < 3; i++) {
			if (Integer.parseInt(ver[i]) > Integer.parseInt(old_ver[i])) {
				System.out.println("NO");	
				System.exit(0);
			}
		}
		System.out.println("YES");
	}
}