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.*;

class Main{
    public static void main(String[] args)throws IOException{
      try(BufferedReader br = new BufferedReader(new InputStreamReader(System.in))){
        String input = br.readLine();
        boolean flag = false;

        if(input.isEmpty()){
          flag = true;
        }

        if(input.contains("hi")){
          input = input.replace("hi", "");
        }

        if(input.isEmpty()){
          if(flag){
            System.out.println("No");
          }else{
            System.out.println("Yes");
          }
          
        }else{
          System.out.println("No");
        }

        }
      }
}