import java.util.*;
public class Main {
	public static void main(String[] args) {
    	Scanner sc = new Scanner(System.in);
      	String x = sc.next();
        if (x.length() == 6 && (x.charAt(2) == x.charAt(3)) && (x.charAt(4) == x.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