import java.util.*;

class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        String s = sc.next();

        boolean m = s.charAt(2) == s.charAt(3);
        boolean n = s.charAt(4) == s.charAt(5);

        if(m && n) System.out.println("Yes");
        else System.out.println("No");
 
    } 
} import java.util.*; util.* java class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        String s = sc.next();

        boolean m = s.charAt(2) == s.charAt(3);
        boolean n = s.charAt(4) == s.charAt(5);

        if(m && n) 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();

        boolean m = s.charAt(2) == s.charAt(3);
        boolean n = s.charAt(4) == s.charAt(5);

        if(m && n) System.out.println("Yes");
        else System.out.println("No");
 
    } main {
        Scanner sc = new Scanner(System.in);

        String s = sc.next();

        boolean m = s.charAt(2) == s.charAt(3);
        boolean n = s.charAt(4) == s.charAt(5);

        if(m && n) 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 boolean m = s.charAt(2) == s.charAt(3); m s.charAt(2) == s.charAt(3) s.charAt(2) s.charAt s 2 s.charAt(3) s.charAt s 3 boolean n = s.charAt(4) == s.charAt(5); n s.charAt(4) == s.charAt(5) s.charAt(4) s.charAt s 4 s.charAt(5) s.charAt s 5 if(m && n) System.out.println("Yes");
        else System.out.println("No"); m && n m n System.out.println("Yes") System.out.println System.out System System.out "Yes" System.out.println("No") System.out.println System.out System System.out "No" String[] args args
import java.util.*;

class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        String s = sc.next();

        boolean m = s.charAt(2) == s.charAt(3);
        boolean n = s.charAt(4) == s.charAt(5);

        if(m && n) System.out.println("Yes");
        else System.out.println("No");
 
    } 
}