import java.util.Scanner;

public class Main {

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

		String string = sc.nextLine();

		if (string.charAt(2) == string.charAt(3) && string.charAt(4) == string.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 sc = new Scanner(System.in);

		String string = sc.nextLine();

		if (string.charAt(2) == string.charAt(3) && string.charAt(4) == string.charAt(5)) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}

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

		String string = sc.nextLine();

		if (string.charAt(2) == string.charAt(3) && string.charAt(4) == string.charAt(5)) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}

	} main {
		Scanner sc = new Scanner(System.in);

		String string = sc.nextLine();

		if (string.charAt(2) == string.charAt(3) && string.charAt(4) == string.charAt(5)) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}

	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String string = sc.nextLine(); string sc.nextLine() sc.nextLine sc if (string.charAt(2) == string.charAt(3) && string.charAt(4) == string.charAt(5)) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		} string.charAt(2) == string.charAt(3) && string.charAt(4) == string.charAt(5) string.charAt(2) == string.charAt(3) string.charAt(2) string.charAt string 2 string.charAt(3) string.charAt string 3 string.charAt(4) == string.charAt(5) string.charAt(4) string.charAt string 4 string.charAt(5) string.charAt string 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 sc = new Scanner(System.in);

		String string = sc.nextLine();

		if (string.charAt(2) == string.charAt(3) && string.charAt(4) == string.charAt(5)) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}

	}
} public class Main {

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

		String string = sc.nextLine();

		if (string.charAt(2) == string.charAt(3) && string.charAt(4) == string.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 sc = new Scanner(System.in);

		String string = sc.nextLine();

		if (string.charAt(2) == string.charAt(3) && string.charAt(4) == string.charAt(5)) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}

	}
}