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.io.*;
import java.util.*;
import java.util.ArrayList;
 
class Main
{
  public static void main (String[] arg)
  {
    Scanner scan = new Scanner(System.in);
    
    String hitachi = scan.next(); //整数   
    
    if(hitachi.equals("hi") ||
       hitachi.equals("hihi") ||
       hitachi.equals("hihihi") ||
       hitachi.equals("hihihihi") ||
       hitachi.equals("hihihihihi") ){
      
      System.out.println("Yes");
    }
    
    else{
      System.out.println("No");
    }
  }
}