import java.util.Scanner;
public class Main {
	 public static void main(String args[]){
	Scanner scanner = new Scanner(System.in);
	// "abc"という文字列
	String a=scanner.next();

	 String str3 = String.valueOf(a.charAt(2));
	    String str4 = String.valueOf(a.charAt(3));
	    String str5 = String.valueOf(a.charAt(4));
	    String str6 = String.valueOf(a.charAt(5));
	    if(str3.equals(str4) && str5.equals(str6)){
	    		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