
import java.util.Collections;
import java.util.ArrayList;
import java.util.*;
import java.util.regex.Pattern;  
import java.util.Scanner;  
import java.util.regex.Matcher; 
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");
					
				}
		
				
			
					
		     
		     }		
			
		
	}

	
	
	
}
		 import java.util.Collections; Collections java.util import java.util.ArrayList; ArrayList java.util import java.util.*; util.* java import java.util.regex.Pattern; Pattern java.util.regex import java.util.Scanner; Scanner java.util import java.util.regex.Matcher; Matcher java.util.regex 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");
					
				}
		
				
			
					
		     
		     }		
			
		
	}

	
	
	
} 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");
					
				}
		
				
			
					
		     
		     }		
			
		
	} 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");
					
				}
		
				
			
					
		     
		     }		
			
		
	} Scanner sc=new Scanner(System.in); 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");
					
				}
		
				
			
					
		     
		     } 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" 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");
					
				}
		
				
			
					
		     
		     }		
			
		
	}

	
	
	
} 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");
					
				}
		
				
			
					
		     
		     }		
			
		
	}

	
	
	
} Main

import java.util.Collections;
import java.util.ArrayList;
import java.util.*;
import java.util.regex.Pattern;  
import java.util.Scanner;  
import java.util.regex.Matcher; 
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");
					
				}
		
				
			
					
		     
		     }		
			
		
	}

	
	
	
}
		
