import java.util.*;
class Main
{
	public static void main(String[] args)                                        
	{
		Scanner sc=new Scanner(System.in);
		int t,k,l;
		String p;
		p=sc.next();
		
		if((p.charAt(2)==p.charAt(3))&&(p.charAt(4)==p.charAt(5)))
		System.out.println("Yes");
		else
				System.out.println("No");

		
		
		
	
		
	}
	
	
			
	
		
}
 import java.util.*; util.* java class Main
{
	public static void main(String[] args)                                        
	{
		Scanner sc=new Scanner(System.in);
		int t,k,l;
		String p;
		p=sc.next();
		
		if((p.charAt(2)==p.charAt(3))&&(p.charAt(4)==p.charAt(5)))
		System.out.println("Yes");
		else
				System.out.println("No");

		
		
		
	
		
	}
	
	
			
	
		
} Main public static void main(String[] args)                                        
	{
		Scanner sc=new Scanner(System.in);
		int t,k,l;
		String p;
		p=sc.next();
		
		if((p.charAt(2)==p.charAt(3))&&(p.charAt(4)==p.charAt(5)))
		System.out.println("Yes");
		else
				System.out.println("No");

		
		
		
	
		
	} main {
		Scanner sc=new Scanner(System.in);
		int t,k,l;
		String p;
		p=sc.next();
		
		if((p.charAt(2)==p.charAt(3))&&(p.charAt(4)==p.charAt(5)))
		System.out.println("Yes");
		else
				System.out.println("No");

		
		
		
	
		
	} Scanner sc=new Scanner(System.in); sc new Scanner(System.in) int t t k k l; l String p; p p=sc.next() p sc.next() sc.next sc if((p.charAt(2)==p.charAt(3))&&(p.charAt(4)==p.charAt(5)))
		System.out.println("Yes");
		else
				System.out.println("No"); (p.charAt(2)==p.charAt(3))&&(p.charAt(4)==p.charAt(5)) (p.charAt(2)==p.charAt(3)) p.charAt(2) p.charAt p 2 p.charAt(3) p.charAt p 3 (p.charAt(4)==p.charAt(5)) p.charAt(4) p.charAt p 4 p.charAt(5) p.charAt p 5 System.out.println("Yes") System.out.println System.out System System.out "Yes" System.out.println("No") System.out.println System.out System System.out "No" String[] args args
import java.util.*;
class Main
{
	public static void main(String[] args)                                        
	{
		Scanner sc=new Scanner(System.in);
		int t,k,l;
		String p;
		p=sc.next();
		
		if((p.charAt(2)==p.charAt(3))&&(p.charAt(4)==p.charAt(5)))
		System.out.println("Yes");
		else
				System.out.println("No");

		
		
		
	
		
	}
	
	
			
	
		
}

