import java.util.Scanner;

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

		String[] list = S.split("", 0);

		if (list[2].equals(list[3])  & list[4].equals(list[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 S = sc.next();

		String[] list = S.split("", 0);

		if (list[2].equals(list[3])  & list[4].equals(list[5])) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String S = sc.next();

		String[] list = S.split("", 0);

		if (list[2].equals(list[3])  & list[4].equals(list[5])) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}
	} main {
		Scanner sc = new Scanner(System.in);
		String S = sc.next();

		String[] list = S.split("", 0);

		if (list[2].equals(list[3])  & list[4].equals(list[5])) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String S = sc.next(); S sc.next() sc.next sc String[] list = S.split("", 0); list S.split("", 0) S.split S "" 0 if (list[2].equals(list[3])  & list[4].equals(list[5])) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		} list[2].equals(list[3])  & list[4].equals(list[5]) list[2].equals(list[3]) list[2].equals list[2] list 2 list[3] list 3 list[4].equals(list[5]) list[4].equals list[4] list 4 list[5] list 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 S = sc.next();

		String[] list = S.split("", 0);

		if (list[2].equals(list[3])  & list[4].equals(list[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 S = sc.next();

		String[] list = S.split("", 0);

		if (list[2].equals(list[3])  & list[4].equals(list[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 S = sc.next();

		String[] list = S.split("", 0);

		if (list[2].equals(list[3])  & list[4].equals(list[5])) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}
	}
}