import java.util.Scanner;

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

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