import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String str = sc.nextLine();
        char[] array = str.toCharArray();
        if(array[2] == array[3] && array[4] == array[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 sc = new Scanner(System.in);
        String str = sc.nextLine();
        char[] array = str.toCharArray();
        if(array[2] == array[3] && array[4] == array[5]){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String str = sc.nextLine();
        char[] array = str.toCharArray();
        if(array[2] == array[3] && array[4] == array[5]){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    } main {
        Scanner sc = new Scanner(System.in);
        String str = sc.nextLine();
        char[] array = str.toCharArray();
        if(array[2] == array[3] && array[4] == array[5]){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String str = sc.nextLine(); str sc.nextLine() sc.nextLine sc char[] array = str.toCharArray(); array str.toCharArray() str.toCharArray str if(array[2] == array[3] && array[4] == array[5]){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        } array[2] == array[3] && array[4] == array[5] array[2] == array[3] array[2] array 2 array[3] array 3 array[4] == array[5] array[4] array 4 array[5] array 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 str = sc.nextLine();
        char[] array = str.toCharArray();
        if(array[2] == array[3] && array[4] == array[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 str = sc.nextLine();
        char[] array = str.toCharArray();
        if(array[2] == array[3] && array[4] == array[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 sc = new Scanner(System.in);
        String str = sc.nextLine();
        char[] array = str.toCharArray();
        if(array[2] == array[3] && array[4] == array[5]){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    }
}