import java.util.*;
class Main
{
    public static void main(String args[]){
        Scanner sc=new Scanner(System.in);
        String s=sc.nextLine();
        if(s.length()<6)
            System.out.println("No");
        if(s.charAt(2)==s.charAt(3)&&s.charAt(4)==s.charAt(5))
            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.nextLine();
        if(s.length()<6)
            System.out.println("No");
        if(s.charAt(2)==s.charAt(3)&&s.charAt(4)==s.charAt(5))
            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.nextLine();
        if(s.length()<6)
            System.out.println("No");
        if(s.charAt(2)==s.charAt(3)&&s.charAt(4)==s.charAt(5))
            System.out.println("Yes");
        else
            System.out.println("No");
    } main {
        Scanner sc=new Scanner(System.in);
        String s=sc.nextLine();
        if(s.length()<6)
            System.out.println("No");
        if(s.charAt(2)==s.charAt(3)&&s.charAt(4)==s.charAt(5))
            System.out.println("Yes");
        else
            System.out.println("No");
    } Scanner sc=new Scanner(System.in); sc new Scanner(System.in) String s=sc.nextLine(); s sc.nextLine() sc.nextLine sc if(s.length()<6)
            System.out.println("No"); s.length()<6 s.length() s.length s 6 System.out.println("No") System.out.println System.out System System.out "No" if(s.charAt(2)==s.charAt(3)&&s.charAt(4)==s.charAt(5))
            System.out.println("Yes");
        else
            System.out.println("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 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.nextLine();
        if(s.length()<6)
            System.out.println("No");
        if(s.charAt(2)==s.charAt(3)&&s.charAt(4)==s.charAt(5))
            System.out.println("Yes");
        else
            System.out.println("No");
    }
}