import java.util.Scanner;

public final class Main {

	public static void main(String[] args) {
		try (Scanner scanner = new Scanner(System.in)) {
			final String s = scanner.next();
			if (s.charAt(2) == s.charAt(3) && s.charAt(4) == s.charAt(5)) {
				System.out.println("Yes");
			} else {
				System.out.println("No");
			}
		}
	}

} import java.util.Scanner; Scanner java.util public final class Main {

	public static void main(String[] args) {
		try (Scanner scanner = new Scanner(System.in)) {
			final String s = scanner.next();
			if (s.charAt(2) == s.charAt(3) && s.charAt(4) == s.charAt(5)) {
				System.out.println("Yes");
			} else {
				System.out.println("No");
			}
		}
	}

} Main public static void main(String[] args) {
		try (Scanner scanner = new Scanner(System.in)) {
			final String s = scanner.next();
			if (s.charAt(2) == s.charAt(3) && s.charAt(4) == s.charAt(5)) {
				System.out.println("Yes");
			} else {
				System.out.println("No");
			}
		}
	} main {
		try (Scanner scanner = new Scanner(System.in)) {
			final String s = scanner.next();
			if (s.charAt(2) == s.charAt(3) && s.charAt(4) == s.charAt(5)) {
				System.out.println("Yes");
			} else {
				System.out.println("No");
			}
		}
	} try (Scanner scanner = new Scanner(System.in)) {
			final String s = scanner.next();
			if (s.charAt(2) == s.charAt(3) && s.charAt(4) == s.charAt(5)) {
				System.out.println("Yes");
			} else {
				System.out.println("No");
			}
		} {
			final String s = scanner.next();
			if (s.charAt(2) == s.charAt(3) && s.charAt(4) == s.charAt(5)) {
				System.out.println("Yes");
			} else {
				System.out.println("No");
			}
		} Scanner scanner = new Scanner(System.in) Scanner scanner = new Scanner(System.in) new Scanner(System.in) final String s = scanner.next(); s scanner.next() scanner.next scanner if (s.charAt(2) == s.charAt(3) && s.charAt(4) == s.charAt(5)) {
				System.out.println("Yes");
			} else {
				System.out.println("No");
			} s.charAt(2) == s.charAt(3) && s.charAt(4) == s.charAt(5) s.charAt(2) == s.charAt(3) s.charAt(2) s.charAt s 2 s.charAt(3) s.charAt s 3 s.charAt(4) == s.charAt(5) s.charAt(4) s.charAt s 4 s.charAt(5) s.charAt s 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 final class Main {

	public static void main(String[] args) {
		try (Scanner scanner = new Scanner(System.in)) {
			final String s = scanner.next();
			if (s.charAt(2) == s.charAt(3) && s.charAt(4) == s.charAt(5)) {
				System.out.println("Yes");
			} else {
				System.out.println("No");
			}
		}
	}

} public final class Main {

	public static void main(String[] args) {
		try (Scanner scanner = new Scanner(System.in)) {
			final String s = scanner.next();
			if (s.charAt(2) == s.charAt(3) && s.charAt(4) == s.charAt(5)) {
				System.out.println("Yes");
			} else {
				System.out.println("No");
			}
		}
	}

} Main
import java.util.Scanner;

public final class Main {

	public static void main(String[] args) {
		try (Scanner scanner = new Scanner(System.in)) {
			final String s = scanner.next();
			if (s.charAt(2) == s.charAt(3) && s.charAt(4) == s.charAt(5)) {
				System.out.println("Yes");
			} else {
				System.out.println("No");
			}
		}
	}

}
