import java.util.Scanner;

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