import java.util.Scanner;

public class Main {
	public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		String[] input = sc.next().split("");
		if (input[2].equals(input[3]) && input[4].equals(input[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) throws Exception {
		Scanner sc = new Scanner(System.in);
		String[] input = sc.next().split("");
		if (input[2].equals(input[3]) && input[4].equals(input[5])) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	}
} Main public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		String[] input = sc.next().split("");
		if (input[2].equals(input[3]) && input[4].equals(input[5])) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	} main {
		Scanner sc = new Scanner(System.in);
		String[] input = sc.next().split("");
		if (input[2].equals(input[3]) && input[4].equals(input[5])) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String[] input = sc.next().split(""); input sc.next().split("") sc.next().split sc.next() sc.next sc "" if (input[2].equals(input[3]) && input[4].equals(input[5])) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		} input[2].equals(input[3]) && input[4].equals(input[5]) input[2].equals(input[3]) input[2].equals input[2] input 2 input[3] input 3 input[4].equals(input[5]) input[4].equals input[4] input 4 input[5] input 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) throws Exception {
		Scanner sc = new Scanner(System.in);
		String[] input = sc.next().split("");
		if (input[2].equals(input[3]) && input[4].equals(input[5])) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	}
} public class Main {
	public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		String[] input = sc.next().split("");
		if (input[2].equals(input[3]) && input[4].equals(input[5])) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	}
} Main
import java.util.Scanner;

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