import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		String A = sc.next();

		if (A.charAt(2) == A.charAt(3) && A.charAt(4) == A.charAt(5)) {

			System.out.print("Yes");

		} else {
			System.out.print("No");
		}
	}
} import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		String A = sc.next();

		if (A.charAt(2) == A.charAt(3) && A.charAt(4) == A.charAt(5)) {

			System.out.print("Yes");

		} else {
			System.out.print("No");
		}
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		String A = sc.next();

		if (A.charAt(2) == A.charAt(3) && A.charAt(4) == A.charAt(5)) {

			System.out.print("Yes");

		} else {
			System.out.print("No");
		}
	} main {
		Scanner sc = new Scanner(System.in);

		String A = sc.next();

		if (A.charAt(2) == A.charAt(3) && A.charAt(4) == A.charAt(5)) {

			System.out.print("Yes");

		} else {
			System.out.print("No");
		}
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String A = sc.next(); A sc.next() sc.next sc if (A.charAt(2) == A.charAt(3) && A.charAt(4) == A.charAt(5)) {

			System.out.print("Yes");

		} else {
			System.out.print("No");
		} A.charAt(2) == A.charAt(3) && A.charAt(4) == A.charAt(5) A.charAt(2) == A.charAt(3) A.charAt(2) A.charAt A 2 A.charAt(3) A.charAt A 3 A.charAt(4) == A.charAt(5) A.charAt(4) A.charAt A 4 A.charAt(5) A.charAt A 5 {

			System.out.print("Yes");

		} System.out.print("Yes") System.out.print System.out System System.out "Yes" {
			System.out.print("No");
		} System.out.print("No") System.out.print System.out System System.out "No" String[] args args public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		String A = sc.next();

		if (A.charAt(2) == A.charAt(3) && A.charAt(4) == A.charAt(5)) {

			System.out.print("Yes");

		} else {
			System.out.print("No");
		}
	}
} public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		String A = sc.next();

		if (A.charAt(2) == A.charAt(3) && A.charAt(4) == A.charAt(5)) {

			System.out.print("Yes");

		} else {
			System.out.print("No");
		}
	}
} Main
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		String A = sc.next();

		if (A.charAt(2) == A.charAt(3) && A.charAt(4) == A.charAt(5)) {

			System.out.print("Yes");

		} else {
			System.out.print("No");
		}
	}
}
