import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        
        System.out.println(
            s.charAt(2)==s.charAt(3)&&s.charAt(4)==s.charAt(5)?"Yes":"No"
        );
    }
} import java.util.*; util.* java public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        
        System.out.println(
            s.charAt(2)==s.charAt(3)&&s.charAt(4)==s.charAt(5)?"Yes":"No"
        );
    }
} Main public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        
        System.out.println(
            s.charAt(2)==s.charAt(3)&&s.charAt(4)==s.charAt(5)?"Yes":"No"
        );
    } main {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        
        System.out.println(
            s.charAt(2)==s.charAt(3)&&s.charAt(4)==s.charAt(5)?"Yes":"No"
        );
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String s = sc.next(); s sc.next() sc.next sc System.out.println(
            s.charAt(2)==s.charAt(3)&&s.charAt(4)==s.charAt(5)?"Yes":"No"
        ) System.out.println System.out System System.out s.charAt(2)==s.charAt(3)&&s.charAt(4)==s.charAt(5)?"Yes":"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 "Yes" "No" String[] args args public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        
        System.out.println(
            s.charAt(2)==s.charAt(3)&&s.charAt(4)==s.charAt(5)?"Yes":"No"
        );
    }
} public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        
        System.out.println(
            s.charAt(2)==s.charAt(3)&&s.charAt(4)==s.charAt(5)?"Yes":"No"
        );
    }
} Main
import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        
        System.out.println(
            s.charAt(2)==s.charAt(3)&&s.charAt(4)==s.charAt(5)?"Yes":"No"
        );
    }
}