class Version {
	int[] num = new int[3];

}

public class No_138 {

	public static void main(String[] args) {
		java.util.Scanner sc = new java.util.Scanner(System.in);
		String[] s1 = sc.nextLine().split("\\.");
		String[] s2 = sc.nextLine().split("\\.");
		String ans = "YES";

		Version old = new Version();
		Version set = new Version();

		for (int i = 0; i < 3; i++) {
			old.num[i] = Integer.parseInt(s1[i]);
			set.num[i] = Integer.parseInt(s2[i]);
			if (old.num[i] < set.num[i]) {
				ans = "NO";
				break;
			}
		}
		System.out.println(ans);
		sc.close();

	}

}