import java.util.*;

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