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