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.*;
 
public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        
        //int customers = Integer.parseInt(sc.next());
        String 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");
        
    }
    
}