import java.util.Scanner;

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

        String s = scanner.nextLine();
        char[] chars = s.toCharArray();

        if (chars[2] == chars[3] && chars[4] == chars[5]){
            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 scanner = new Scanner(System.in);

        String s = scanner.nextLine();
        char[] chars = s.toCharArray();

        if (chars[2] == chars[3] && chars[4] == chars[5]){
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }

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

        String s = scanner.nextLine();
        char[] chars = s.toCharArray();

        if (chars[2] == chars[3] && chars[4] == chars[5]){
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }

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

        String s = scanner.nextLine();
        char[] chars = s.toCharArray();

        if (chars[2] == chars[3] && chars[4] == chars[5]){
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }

    } Scanner scanner = new Scanner(System.in); scanner new Scanner(System.in) String s = scanner.nextLine(); s scanner.nextLine() scanner.nextLine scanner char[] chars = s.toCharArray(); chars s.toCharArray() s.toCharArray s if (chars[2] == chars[3] && chars[4] == chars[5]){
            System.out.println("Yes");
        } else {
            System.out.println("No");
        } chars[2] == chars[3] && chars[4] == chars[5] chars[2] == chars[3] chars[2] chars 2 chars[3] chars 3 chars[4] == chars[5] chars[4] chars 4 chars[5] chars 5 {
            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 scanner = new Scanner(System.in);

        String s = scanner.nextLine();
        char[] chars = s.toCharArray();

        if (chars[2] == chars[3] && chars[4] == chars[5]){
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }

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

        String s = scanner.nextLine();
        char[] chars = s.toCharArray();

        if (chars[2] == chars[3] && chars[4] == chars[5]){
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }

    }
} Main
import java.util.Scanner;

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

        String s = scanner.nextLine();
        char[] chars = s.toCharArray();

        if (chars[2] == chars[3] && chars[4] == chars[5]){
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }

    }
}