import java.lang.reflect.Array;
import java.util.*;


public class Main {

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

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

} import java.lang.reflect.Array; Array java.lang.reflect import java.util.*; util.* java public class Main {

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

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

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

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

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

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

} public class Main {

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

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

} Main
import java.lang.reflect.Array;
import java.util.*;


public class Main {

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

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

}
