import java.util.*;
import java.io.IOException;

class Main{
	public static void main(String args[]){
		
		Scanner sc=new Scanner(System.in);
		
		String str=sc.next();
		
		
		if(str.charAt(2)==str.charAt(3) &&str.charAt(4)==str.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