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 = "NO";

        if(compare(v1, v2) >= 0)
            ans = "YES";

        System.out.println(ans);
    }

    public static int compare(String[] a, String[] b) {
        for(int i = 0; i < 3; i++) {
            int k = Integer.parseInt(a[i]);
            int t = Integer.parseInt(b[i]);
            if(k != t)
                return k - t;
        }
        return 0;
    }
}