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 javax.lang.model.util.ElementScanner6;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        // 入力
        String s = sc.next();

        // 処理
        String out = "Yes";
        if (s.replace("hi", "").length() != 0){
            out = "No";
        }

        // 出力
        System.out.println(out);
    }
}