import java.util.*;

public class Main{
    public static void main(String[] args){
        Scanner stdIn = new Scanner(System.in);
        String S = stdIn.nextLine();
;
        
        if( S.charAt(2) != S.charAt(3) || S.charAt(4) != S.charAt(5))
            System.out.print("No");
        else
            System.out.print("Yes");
        
        
  
    }
} import java.util.*; util.* java public class Main{
    public static void main(String[] args){
        Scanner stdIn = new Scanner(System.in);
        String S = stdIn.nextLine();
;
        
        if( S.charAt(2) != S.charAt(3) || S.charAt(4) != S.charAt(5))
            System.out.print("No");
        else
            System.out.print("Yes");
        
        
  
    }
} Main public static void main(String[] args){
        Scanner stdIn = new Scanner(System.in);
        String S = stdIn.nextLine();
;
        
        if( S.charAt(2) != S.charAt(3) || S.charAt(4) != S.charAt(5))
            System.out.print("No");
        else
            System.out.print("Yes");
        
        
  
    } main {
        Scanner stdIn = new Scanner(System.in);
        String S = stdIn.nextLine();
;
        
        if( S.charAt(2) != S.charAt(3) || S.charAt(4) != S.charAt(5))
            System.out.print("No");
        else
            System.out.print("Yes");
        
        
  
    } Scanner stdIn = new Scanner(System.in); stdIn new Scanner(System.in) String S = stdIn.nextLine(); S stdIn.nextLine() stdIn.nextLine stdIn if( S.charAt(2) != S.charAt(3) || S.charAt(4) != S.charAt(5))
            System.out.print("No");
        else
            System.out.print("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 System.out.print("No") System.out.print System.out System System.out "No" System.out.print("Yes") System.out.print System.out System System.out "Yes" String[] args args public class Main{
    public static void main(String[] args){
        Scanner stdIn = new Scanner(System.in);
        String S = stdIn.nextLine();
;
        
        if( S.charAt(2) != S.charAt(3) || S.charAt(4) != S.charAt(5))
            System.out.print("No");
        else
            System.out.print("Yes");
        
        
  
    }
} public class Main{
    public static void main(String[] args){
        Scanner stdIn = new Scanner(System.in);
        String S = stdIn.nextLine();
;
        
        if( S.charAt(2) != S.charAt(3) || S.charAt(4) != S.charAt(5))
            System.out.print("No");
        else
            System.out.print("Yes");
        
        
  
    }
} Main
import java.util.*;

public class Main{
    public static void main(String[] args){
        Scanner stdIn = new Scanner(System.in);
        String S = stdIn.nextLine();
;
        
        if( S.charAt(2) != S.charAt(3) || S.charAt(4) != S.charAt(5))
            System.out.print("No");
        else
            System.out.print("Yes");
        
        
  
    }
}