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.*;
import java.io.*;

public class Main{
  public static void main(String[] args)throws Exception{
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    try{
      String S = br.readLine();
      String hi = "";
      boolean f = false;
      for(int i = 0; i < S.length()/2; i++){
        hi += "hi";
        f = f || hi.equals(S);
      }
      System.out.println(f ? "Yes" : "No");
    }catch(Exception e){
    }
  }
}