import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Main {
	public static void main(String[] args) {
		BufferedReader read = new BufferedReader(new InputStreamReader(System.in));
		try {

			String[] fir = read.readLine().split("\\.");
			String[] sec = read.readLine().split("\\.");

			boolean flag = false;
			for (int i = 0; i < 3; ++i) {
				if (Integer.parseInt(fir[i]) < Integer.parseInt(sec[i])) {
					flag = true;
					break;
				}else if(Integer.parseInt(fir[i]) > Integer.parseInt(sec[i])){
					break;
				}
			}

			if (flag) {
				System.out.println("NO");
			} else {
				System.out.println("YES");
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}