import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
		sc.close();

		char three = s.charAt(2);
		char four = s.charAt(3);
		char five = s.charAt(4);
		char six = s.charAt(5);

		boolean answer = false;
		if (three == four && five == six) {
			answer = true;
		}

		printBool(answer);
	}

	public static void printBool(boolean bool) {
		print(bool ? "Yes" : "No");
	}

	public static void print(Object obj) {
		System.out.println(obj);
	}
}

/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