
import java.util.*;
import java.lang.*;

public class Main {

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

		String str = s.nextLine();

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

 } import java.util.*; util.* java import java.lang.*; lang.* java public class Main {

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

		String str = s.nextLine();

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

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

		String str = s.nextLine();

		if(str.charAt(2)==str.charAt(3) && str.charAt(4)==str.charAt(5)){
			System.out.println("Yes");
		}
		else {
			System.out.println("No");
		}
		
	} main {
		Scanner s = new Scanner(System.in);

		String str = s.nextLine();

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

		String str = s.nextLine();

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

 } public class Main {

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

		String str = s.nextLine();

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

 } Main

import java.util.*;
import java.lang.*;

public class Main {

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

		String str = s.nextLine();

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

 }
