import java.util.Scanner;

public class Main {

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

	}

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

	} main {
		Scanner scan=new Scanner(System.in);
		String S=scan.next();
		if(S.charAt(4)==S.charAt(5) && S.charAt(2)==S.charAt(3))
		{
			System.out.println("Yes");
		}
		else
		{
			System.out.println("No");
		}

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

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

	}

} public class Main {

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

	}

}
