import java.util.*;
public class Main {
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        String t = s;
        t = t.replace(t.charAt(2), t.charAt(3));
        t = t.replace(t.charAt(4), t.charAt(5));
        if(t.equals(s)){
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
} import java.util.*; util.* java public class Main {
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        String t = s;
        t = t.replace(t.charAt(2), t.charAt(3));
        t = t.replace(t.charAt(4), t.charAt(5));
        if(t.equals(s)){
            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.next();
        String t = s;
        t = t.replace(t.charAt(2), t.charAt(3));
        t = t.replace(t.charAt(4), t.charAt(5));
        if(t.equals(s)){
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    } main {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        String t = s;
        t = t.replace(t.charAt(2), t.charAt(3));
        t = t.replace(t.charAt(4), t.charAt(5));
        if(t.equals(s)){
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String s = sc.next(); s sc.next() sc.next sc String t = s; t s t = t.replace(t.charAt(2), t.charAt(3)) t t.replace(t.charAt(2), t.charAt(3)) t.replace t t.charAt(2) t.charAt t 2 t.charAt(3) t.charAt t 3 t = t.replace(t.charAt(4), t.charAt(5)) t t.replace(t.charAt(4), t.charAt(5)) t.replace t t.charAt(4) t.charAt t 4 t.charAt(5) t.charAt t 5 if(t.equals(s)){
            System.out.println("Yes");
        } else {
            System.out.println("No");
        } t.equals(s) t.equals t s {
            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.next();
        String t = s;
        t = t.replace(t.charAt(2), t.charAt(3));
        t = t.replace(t.charAt(4), t.charAt(5));
        if(t.equals(s)){
            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.next();
        String t = s;
        t = t.replace(t.charAt(2), t.charAt(3));
        t = t.replace(t.charAt(4), t.charAt(5));
        if(t.equals(s)){
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
} Main
import java.util.*;
public class Main {
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        String t = s;
        t = t.replace(t.charAt(2), t.charAt(3));
        t = t.replace(t.charAt(4), t.charAt(5));
        if(t.equals(s)){
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
}