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){
        Scanner sc = new Scanner(System.in);
        String s=sc.next();
        if(s.length()%2!=0){
            System.out.println("No");
            return;
        }
        for(int i=0;i<s.length();i+=2)
        {
            if(!s.substring(i,i+2).equals("hi"))
            {
                System.out.println("No");
                return;
            }
        }
        System.out.println("Yes");
    }
}