import java.util.*;

class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        String[] v1 = in.next().split("\\.");
        String[] v2 = in.next().split("\\.");

        String ans = "YES";
        for(int i = 0; i < 3; i++) {
            int k = Integer.parseInt(v1[i]);
            int t = Integer.parseInt(v2[i]);
            if(k < t) {
                ans = "NO";
                break;
            }
        }

        System.out.println(ans);
    }
}