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.ArrayList;
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

		Scanner scan = new Scanner(System.in);

		String s = scan.next();

		ArrayList<String> hitatiList = new ArrayList<>();
		String anser = "No";

		//日立文字の作成
		for (int i = 0; i < 5; i++) {
			String hitati = "";

			for (int j = 0; j <= i; j++) {
				hitati += "hi";
			}
			hitatiList.add(hitati);
		}

		for (String str : hitatiList) {
			if (s.equals(str)) {
				anser = "Yes";
			}
		}
		System.out.println(anser);
	}

}
