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