import java.util.*;
import java.io.IOException;

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

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



