import java.io.*;
import java.util.*;
public class Main
{
	public static void main(String[] args)throws IOException {
		InputStreamReader read=new InputStreamReader(System.in);
		BufferedReader in=new BufferedReader(read);
		String s=in.readLine();
		if(s.charAt(2)==s.charAt(3) && s.charAt(4)==s.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