import java.util.Scanner;
public class Main{

	public static void main(String[] args) {
		        Scanner sc = new Scanner(System.in);

		        String S  = sc.nextLine();


		       int A = S.charAt(2);
		       int B = S.charAt(3);
		       int C = S.charAt(4);
		       int D = S.charAt(5);

		        if(A == B) {
		        	if(C == D) {
		        		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 sc = new Scanner(System.in);

		        String S  = sc.nextLine();


		       int A = S.charAt(2);
		       int B = S.charAt(3);
		       int C = S.charAt(4);
		       int D = S.charAt(5);

		        if(A == B) {
		        	if(C == D) {
		        		System.out.println("Yes");
		        	}
		        	else{
		        		System.out.println("No");
		        	}
		        }else {
		        	System.out.println("No");
		        }

	}
} Main public static void main(String[] args) {
		        Scanner sc = new Scanner(System.in);

		        String S  = sc.nextLine();


		       int A = S.charAt(2);
		       int B = S.charAt(3);
		       int C = S.charAt(4);
		       int D = S.charAt(5);

		        if(A == B) {
		        	if(C == D) {
		        		System.out.println("Yes");
		        	}
		        	else{
		        		System.out.println("No");
		        	}
		        }else {
		        	System.out.println("No");
		        }

	} main {
		        Scanner sc = new Scanner(System.in);

		        String S  = sc.nextLine();


		       int A = S.charAt(2);
		       int B = S.charAt(3);
		       int C = S.charAt(4);
		       int D = S.charAt(5);

		        if(A == B) {
		        	if(C == D) {
		        		System.out.println("Yes");
		        	}
		        	else{
		        		System.out.println("No");
		        	}
		        }else {
		        	System.out.println("No");
		        }

	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String S  = sc.nextLine(); S sc.nextLine() sc.nextLine sc int A = S.charAt(2); A S.charAt(2) S.charAt S 2 int B = S.charAt(3); B S.charAt(3) S.charAt S 3 int C = S.charAt(4); C S.charAt(4) S.charAt S 4 int D = S.charAt(5); D S.charAt(5) S.charAt S 5 if(A == B) {
		        	if(C == D) {
		        		System.out.println("Yes");
		        	}
		        	else{
		        		System.out.println("No");
		        	}
		        }else {
		        	System.out.println("No");
		        } A == B A B {
		        	if(C == D) {
		        		System.out.println("Yes");
		        	}
		        	else{
		        		System.out.println("No");
		        	}
		        } if(C == D) {
		        		System.out.println("Yes");
		        	}
		        	else{
		        		System.out.println("No");
		        	} C == D C D {
		        		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 sc = new Scanner(System.in);

		        String S  = sc.nextLine();


		       int A = S.charAt(2);
		       int B = S.charAt(3);
		       int C = S.charAt(4);
		       int D = S.charAt(5);

		        if(A == B) {
		        	if(C == D) {
		        		System.out.println("Yes");
		        	}
		        	else{
		        		System.out.println("No");
		        	}
		        }else {
		        	System.out.println("No");
		        }

	}
} public class Main{

	public static void main(String[] args) {
		        Scanner sc = new Scanner(System.in);

		        String S  = sc.nextLine();


		       int A = S.charAt(2);
		       int B = S.charAt(3);
		       int C = S.charAt(4);
		       int D = S.charAt(5);

		        if(A == B) {
		        	if(C == D) {
		        		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 sc = new Scanner(System.in);

		        String S  = sc.nextLine();


		       int A = S.charAt(2);
		       int B = S.charAt(3);
		       int C = S.charAt(4);
		       int D = S.charAt(5);

		        if(A == B) {
		        	if(C == D) {
		        		System.out.println("Yes");
		        	}
		        	else{
		        		System.out.println("No");
		        	}
		        }else {
		        	System.out.println("No");
		        }

	}
}