A Hitachi string is a concatenation of one or more copies of the string `hi`.

For example, `hi` and `hihi` are Hitachi strings, while `ha` and `hii` are not.

Given a string S, determine whether S is a Hitachi string.

Constraints

* The length of S is between 1 and 10 (inclusive).
* S is a string consisting of lowercase English letters.

Input

Input is given from Standard Input in the following format:


S


Output

If S is a Hitachi string, print `Yes`; otherwise, print `No`.

Examples

Input

hihi


Output

Yes


Input

hi


Output

Yes


Input

ha


Output

No
import java.util.Scanner;

class Main {
  public static void main(String args[]) {
    String S;
    Scanner sc = new Scanner(System.in);
    S=sc.next();
   if(S.equals("hi")){
       System.out.println("Yes");
   }else if(S.equals("hihi")){
     System.out.println("Yes");
   }else if(S.equals("hihihi")){
     System.out.println("Yes");
   }else if(S.equals("hihihihi")){
     System.out.println("Yes");
   }else if(S.equals("hihihihihi")){
     System.out.println("Yes");
   }else{     System.out.println("No");
}

  }

}