import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		
		String s = scan.next();
		if (s.length() < 6) {
			System.out.println("No");
		}
		
		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 class Main {

	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		
		String s = scan.next();
		if (s.length() < 6) {
			System.out.println("No");
		}
		
		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) {
		Scanner scan = new Scanner(System.in);
		
		String s = scan.next();
		if (s.length() < 6) {
			System.out.println("No");
		}
		
		if (s.charAt(2) == s.charAt(3)
				&& s.charAt(4) == s.charAt(5)) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	} main {
		Scanner scan = new Scanner(System.in);
		
		String s = scan.next();
		if (s.length() < 6) {
			System.out.println("No");
		}
		
		if (s.charAt(2) == s.charAt(3)
				&& s.charAt(4) == s.charAt(5)) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	} Scanner scan = new Scanner(System.in); scan new Scanner(System.in) String s = scan.next(); s scan.next() scan.next scan if (s.length() < 6) {
			System.out.println("No");
		} s.length() < 6 s.length() s.length s 6 {
			System.out.println("No");
		} System.out.println("No") System.out.println System.out System System.out "No" 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 class Main {

	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		
		String s = scan.next();
		if (s.length() < 6) {
			System.out.println("No");
		}
		
		if (s.charAt(2) == s.charAt(3)
				&& s.charAt(4) == s.charAt(5)) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	}

} public class Main {

	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		
		String s = scan.next();
		if (s.length() < 6) {
			System.out.println("No");
		}
		
		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 class Main {

	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		
		String s = scan.next();
		if (s.length() < 6) {
			System.out.println("No");
		}
		
		if (s.charAt(2) == s.charAt(3)
				&& s.charAt(4) == s.charAt(5)) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	}

}
