import java.util.*;
class Main
{
	public static void main(String[] args)                                        
	{
		Scanner sc=new Scanner(System.in);
		int t,k,l;
		String p;
		p=sc.next();
		
		if((p.charAt(2)==p.charAt(3))&&(p.charAt(4)==p.charAt(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