import java.util.Scanner;
import java.util.Arrays;
public class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
		
		System.out.println(s.charAt(2) == s.charAt(3) && s.charAt(4) == s.charAt(5) ? "Yes" : "No");
	}
} import java.util.Scanner; Scanner java.util import java.util.Arrays; Arrays java.util public class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
		
		System.out.println(s.charAt(2) == s.charAt(3) && s.charAt(4) == s.charAt(5) ? "Yes" : "No");
	}
} Main public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
		
		System.out.println(s.charAt(2) == s.charAt(3) && s.charAt(4) == s.charAt(5) ? "Yes" : "No");
	} main {
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
		
		System.out.println(s.charAt(2) == s.charAt(3) && s.charAt(4) == s.charAt(5) ? "Yes" : "No");
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String s = sc.next(); s sc.next() sc.next sc System.out.println(s.charAt(2) == s.charAt(3) && s.charAt(4) == s.charAt(5) ? "Yes" : "No") System.out.println System.out System System.out s.charAt(2) == s.charAt(3) && s.charAt(4) == s.charAt(5) ? "Yes" : "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 "Yes" "No" String[] args args public class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
		
		System.out.println(s.charAt(2) == s.charAt(3) && s.charAt(4) == s.charAt(5) ? "Yes" : "No");
	}
} public class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
		
		System.out.println(s.charAt(2) == s.charAt(3) && s.charAt(4) == s.charAt(5) ? "Yes" : "No");
	}
} Main
import java.util.Scanner;
import java.util.Arrays;
public class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
		
		System.out.println(s.charAt(2) == s.charAt(3) && s.charAt(4) == s.charAt(5) ? "Yes" : "No");
	}
}
