import java.util.*;

public class Main {

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

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

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

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

public class Main {

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