import java.util.Scanner;

 
public class Main {
 
	public static void main(String[] args) {
		
		Scanner sc = new Scanner(System.in);
		String S = sc.nextLine();

		Boolean ans = false;
		if(S.substring(2, 3).equals(S.substring(3, 4)) && S.substring(4, 5).equals(S.substring(5, 6))) {
			ans = true;
		}
		
		if(ans) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}
		sc.close();
		
	}
	
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz