import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

		Scanner scan = new Scanner(System.in);

		String S = scan.next();
		char c3 = S.charAt(2);
		char c4 = S.charAt(3);
		char c5 = S.charAt(4);
		char c6 = S.charAt(5);

		if(c3 == c4 && c5 == c6) {
			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();
		char c3 = S.charAt(2);
		char c4 = S.charAt(3);
		char c5 = S.charAt(4);
		char c6 = S.charAt(5);

		if(c3 == c4 && c5 == c6) {
			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();
		char c3 = S.charAt(2);
		char c4 = S.charAt(3);
		char c5 = S.charAt(4);
		char c6 = S.charAt(5);

		if(c3 == c4 && c5 == c6) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}

	} main {

		Scanner scan = new Scanner(System.in);

		String S = scan.next();
		char c3 = S.charAt(2);
		char c4 = S.charAt(3);
		char c5 = S.charAt(4);
		char c6 = S.charAt(5);

		if(c3 == c4 && c5 == c6) {
			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 char c3 = S.charAt(2); c3 S.charAt(2) S.charAt S 2 char c4 = S.charAt(3); c4 S.charAt(3) S.charAt S 3 char c5 = S.charAt(4); c5 S.charAt(4) S.charAt S 4 char c6 = S.charAt(5); c6 S.charAt(5) S.charAt S 5 if(c3 == c4 && c5 == c6) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		} c3 == c4 && c5 == c6 c3 == c4 c3 c4 c5 == c6 c5 c6 {
			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();
		char c3 = S.charAt(2);
		char c4 = S.charAt(3);
		char c5 = S.charAt(4);
		char c6 = S.charAt(5);

		if(c3 == c4 && c5 == c6) {
			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();
		char c3 = S.charAt(2);
		char c4 = S.charAt(3);
		char c5 = S.charAt(4);
		char c6 = S.charAt(5);

		if(c3 == c4 && c5 == c6) {
			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();
		char c3 = S.charAt(2);
		char c4 = S.charAt(3);
		char c5 = S.charAt(4);
		char c6 = S.charAt(5);

		if(c3 == c4 && c5 == c6) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}

	}

}
