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