import java.util.Scanner;

public class Main {
	
	public static void main(String[] args) {
		
		Scanner scanner = new Scanner(System.in);
		
		String s = scanner.nextLine();
		
		scanner.close();
		
		String[] list = s.split("");
		
		if (list[2].equals(list[3]) && list[4].equals(list[5])) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	}

} import java.util.Scanner; Scanner java.util public class Main {
	
	public static void main(String[] args) {
		
		Scanner scanner = new Scanner(System.in);
		
		String s = scanner.nextLine();
		
		scanner.close();
		
		String[] list = s.split("");
		
		if (list[2].equals(list[3]) && list[4].equals(list[5])) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	}

} Main public static void main(String[] args) {
		
		Scanner scanner = new Scanner(System.in);
		
		String s = scanner.nextLine();
		
		scanner.close();
		
		String[] list = s.split("");
		
		if (list[2].equals(list[3]) && list[4].equals(list[5])) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	} main {
		
		Scanner scanner = new Scanner(System.in);
		
		String s = scanner.nextLine();
		
		scanner.close();
		
		String[] list = s.split("");
		
		if (list[2].equals(list[3]) && list[4].equals(list[5])) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	} Scanner scanner = new Scanner(System.in); scanner new Scanner(System.in) String s = scanner.nextLine(); s scanner.nextLine() scanner.nextLine scanner scanner.close() scanner.close scanner String[] list = s.split(""); list s.split("") s.split s "" if (list[2].equals(list[3]) && list[4].equals(list[5])) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		} list[2].equals(list[3]) && list[4].equals(list[5]) list[2].equals(list[3]) list[2].equals list[2] list 2 list[3] list 3 list[4].equals(list[5]) list[4].equals list[4] list 4 list[5] list 5 {
			System.out.println("Yes");
		} System.out.println("Yes") System.out.println System.out System System.out "Yes" {
			System.out.println("No");
		} System.out.println("No") System.out.println System.out System System.out "No" String[] args args public class Main {
	
	public static void main(String[] args) {
		
		Scanner scanner = new Scanner(System.in);
		
		String s = scanner.nextLine();
		
		scanner.close();
		
		String[] list = s.split("");
		
		if (list[2].equals(list[3]) && list[4].equals(list[5])) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	}

} public class Main {
	
	public static void main(String[] args) {
		
		Scanner scanner = new Scanner(System.in);
		
		String s = scanner.nextLine();
		
		scanner.close();
		
		String[] list = s.split("");
		
		if (list[2].equals(list[3]) && list[4].equals(list[5])) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	}

} Main
import java.util.Scanner;

public class Main {
	
	public static void main(String[] args) {
		
		Scanner scanner = new Scanner(System.in);
		
		String s = scanner.nextLine();
		
		scanner.close();
		
		String[] list = s.split("");
		
		if (list[2].equals(list[3]) && list[4].equals(list[5])) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	}

}
