import java.math.BigDecimal;
import java.util.ArrayList;
import java.util.List;
import java.util.Objects;
import java.util.Scanner;
import java.util.regex.Pattern;

public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);
		String str = sc.nextLine();
		
		if(Objects.equals(str.charAt(2), str.charAt(3)) && Objects.equals(str.charAt(4), str.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