

import java.util.Scanner;

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

		String s = sc.next();

		if (s.substring(2, 3).equals(s.substring(3, 4)) && s.substring(4, 5).equals(s.substring(5, 6))) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
		sc.close();
	}
} 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();

		if (s.substring(2, 3).equals(s.substring(3, 4)) && s.substring(4, 5).equals(s.substring(5, 6))) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
		sc.close();
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		String s = sc.next();

		if (s.substring(2, 3).equals(s.substring(3, 4)) && s.substring(4, 5).equals(s.substring(5, 6))) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
		sc.close();
	} main {
		Scanner sc = new Scanner(System.in);

		String s = sc.next();

		if (s.substring(2, 3).equals(s.substring(3, 4)) && s.substring(4, 5).equals(s.substring(5, 6))) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
		sc.close();
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String s = sc.next(); s sc.next() sc.next sc if (s.substring(2, 3).equals(s.substring(3, 4)) && s.substring(4, 5).equals(s.substring(5, 6))) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		} s.substring(2, 3).equals(s.substring(3, 4)) && s.substring(4, 5).equals(s.substring(5, 6)) s.substring(2, 3).equals(s.substring(3, 4)) s.substring(2, 3).equals s.substring(2, 3) s.substring s 2 3 s.substring(3, 4) s.substring s 3 4 s.substring(4, 5).equals(s.substring(5, 6)) s.substring(4, 5).equals s.substring(4, 5) s.substring s 4 5 s.substring(5, 6) s.substring s 5 6 {
			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" sc.close() sc.close sc String[] args args public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		String s = sc.next();

		if (s.substring(2, 3).equals(s.substring(3, 4)) && s.substring(4, 5).equals(s.substring(5, 6))) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
		sc.close();
	}
} public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		String s = sc.next();

		if (s.substring(2, 3).equals(s.substring(3, 4)) && s.substring(4, 5).equals(s.substring(5, 6))) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
		sc.close();
	}
} Main


import java.util.Scanner;

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

		String s = sc.next();

		if (s.substring(2, 3).equals(s.substring(3, 4)) && s.substring(4, 5).equals(s.substring(5, 6))) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
		sc.close();
	}
}
