import java.util.*;

public class Main {

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

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
		char three = s.charAt(2);
		char four = s.charAt(3);
		char five = s.charAt(4);
		char six = s.charAt(5);
		
		if(three == four && five == six) {
			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.next();
		char three = s.charAt(2);
		char four = s.charAt(3);
		char five = s.charAt(4);
		char six = s.charAt(5);
		
		if(three == four && five == six) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	} main {
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
		char three = s.charAt(2);
		char four = s.charAt(3);
		char five = s.charAt(4);
		char six = s.charAt(5);
		
		if(three == four && five == six) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String s = sc.next(); s sc.next() sc.next sc char three = s.charAt(2); three s.charAt(2) s.charAt s 2 char four = s.charAt(3); four s.charAt(3) s.charAt s 3 char five = s.charAt(4); five s.charAt(4) s.charAt s 4 char six = s.charAt(5); six s.charAt(5) s.charAt s 5 if(three == four && five == six) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		} three == four && five == six three == four three four five == six five six {
			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.next();
		char three = s.charAt(2);
		char four = s.charAt(3);
		char five = s.charAt(4);
		char six = s.charAt(5);
		
		if(three == four && five == six) {
			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.next();
		char three = s.charAt(2);
		char four = s.charAt(3);
		char five = s.charAt(4);
		char six = s.charAt(5);
		
		if(three == four && five == six) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	}
} Main
import java.util.*;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
		char three = s.charAt(2);
		char four = s.charAt(3);
		char five = s.charAt(4);
		char six = s.charAt(5);
		
		if(three == four && five == six) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	}
}
