import java.math.*;
import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String aString = sc.next();
        String bString=sc.next();
        if((int)aString.charAt(0) < (int)bString.charAt(0) ){
        	System.out.println("NO");
        	return;
        }
        if((int)aString.charAt(2) < (int)bString.charAt(2) ){
        	System.out.println("NO");
        	return;
        }
        if((int)aString.charAt(4) < (int)bString.charAt(4) ){
        	System.out.println("NO");
        	return;
        }
        System.out.println("YES");
        
    }
}