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{
	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){
			int tmp = i + 2;
			String str = S.substring(i, tmp);
			if(str.equals("hi")){
				continue;
			}else{
				System.out.println("No");
				return;
			}
		}
		
		System.out.println("Yes");
	}

}