import java.util.*;
public class Main {
    public static void main(String[] args) throws Exception {
        Scanner koko = new Scanner(System.in);
        String a = koko.next();
        String b = koko.next();
        String[] ah = a.split("\\.");
        String[] bh = b.split("\\.");
        int[] c = new int[6];
        for(int i=0; i<3; i++){
            c[i] = Integer.parseInt(ah[i]);
            c[i+3] = Integer.parseInt(bh[i]);
        }
        if(c[3]>c[0]){
            System.out.println("NO");
        }else if(c[3]<c[0]){
            System.out.println("YES");
        }else if(c[4]>c[1]){
            System.out.println("NO");
        }else if(c[4]<c[1]){
            System.out.println("YES");
        }else if(c[5]>c[2]){
            System.out.println("NO");
        }else if(c[5]<=c[2]){
            System.out.println("YES");
        }
    }
}