import java.util.Scanner;

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