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.*;

class Main {

    Main(){
        Scanner SC = new Scanner(System.in);
        String S = SC.next();

        String HI = "hi";
        while(S.length() >= HI.length()){
            if(S.equals(HI)){
                System.out.println("Yes");
                return;
            }
            HI = HI + "hi";
        }

        System.out.println("No");
    }

    public static void main(String[] args){
        Main main = new Main();
    }
}
