import java.util.Scanner;

public class Main {
	public static void main(String[] args){
		Scanner stdIn = new Scanner(System.in);
		String S = stdIn.next();
		char S3 = S.charAt(2);
		char S4 = S.charAt(3);
		char S5 = S.charAt(4);
		char S6 = S.charAt(5);
		if(S3 == S4 && S5 == S6){
			System.out.println("Yes");
		}
		else{
			System.out.println("No");
		}
		stdIn.close();
	}
} import java.util.Scanner; Scanner java.util public class Main {
	public static void main(String[] args){
		Scanner stdIn = new Scanner(System.in);
		String S = stdIn.next();
		char S3 = S.charAt(2);
		char S4 = S.charAt(3);
		char S5 = S.charAt(4);
		char S6 = S.charAt(5);
		if(S3 == S4 && S5 == S6){
			System.out.println("Yes");
		}
		else{
			System.out.println("No");
		}
		stdIn.close();
	}
} Main public static void main(String[] args){
		Scanner stdIn = new Scanner(System.in);
		String S = stdIn.next();
		char S3 = S.charAt(2);
		char S4 = S.charAt(3);
		char S5 = S.charAt(4);
		char S6 = S.charAt(5);
		if(S3 == S4 && S5 == S6){
			System.out.println("Yes");
		}
		else{
			System.out.println("No");
		}
		stdIn.close();
	} main {
		Scanner stdIn = new Scanner(System.in);
		String S = stdIn.next();
		char S3 = S.charAt(2);
		char S4 = S.charAt(3);
		char S5 = S.charAt(4);
		char S6 = S.charAt(5);
		if(S3 == S4 && S5 == S6){
			System.out.println("Yes");
		}
		else{
			System.out.println("No");
		}
		stdIn.close();
	} Scanner stdIn = new Scanner(System.in); stdIn new Scanner(System.in) String S = stdIn.next(); S stdIn.next() stdIn.next stdIn char S3 = S.charAt(2); S3 S.charAt(2) S.charAt S 2 char S4 = S.charAt(3); S4 S.charAt(3) S.charAt S 3 char S5 = S.charAt(4); S5 S.charAt(4) S.charAt S 4 char S6 = S.charAt(5); S6 S.charAt(5) S.charAt S 5 if(S3 == S4 && S5 == S6){
			System.out.println("Yes");
		}
		else{
			System.out.println("No");
		} S3 == S4 && S5 == S6 S3 == S4 S3 S4 S5 == S6 S5 S6 {
			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" stdIn.close() stdIn.close stdIn String[] args args public class Main {
	public static void main(String[] args){
		Scanner stdIn = new Scanner(System.in);
		String S = stdIn.next();
		char S3 = S.charAt(2);
		char S4 = S.charAt(3);
		char S5 = S.charAt(4);
		char S6 = S.charAt(5);
		if(S3 == S4 && S5 == S6){
			System.out.println("Yes");
		}
		else{
			System.out.println("No");
		}
		stdIn.close();
	}
} public class Main {
	public static void main(String[] args){
		Scanner stdIn = new Scanner(System.in);
		String S = stdIn.next();
		char S3 = S.charAt(2);
		char S4 = S.charAt(3);
		char S5 = S.charAt(4);
		char S6 = S.charAt(5);
		if(S3 == S4 && S5 == S6){
			System.out.println("Yes");
		}
		else{
			System.out.println("No");
		}
		stdIn.close();
	}
} Main
import java.util.Scanner;

public class Main {
	public static void main(String[] args){
		Scanner stdIn = new Scanner(System.in);
		String S = stdIn.next();
		char S3 = S.charAt(2);
		char S4 = S.charAt(3);
		char S5 = S.charAt(4);
		char S6 = S.charAt(5);
		if(S3 == S4 && S5 == S6){
			System.out.println("Yes");
		}
		else{
			System.out.println("No");
		}
		stdIn.close();
	}
}