import java.util.*;

public class Main{
	public static void main(String[] args) {
		Scanner input =new Scanner(System.in);
		
		String str=input.next();
		char[] a = str.toCharArray();
		
		if((a[2]==a[3])&&(a[4]==a[5])) {
			System.out.println("Yes");
		}
		else {
			System.out.println("No");
		}
	}	
}

/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