import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		String s=scan.nextLine();
		int c=0;
		for(int i=0;i<s.length();i++)
		{
			if(s.charAt(2)==s.charAt(3) && s.charAt(4)==s.charAt(5))c=1; 
		
		}
		if(c==1) 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