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.Scanner;
 
public class Main {
 
	public static final MyScanner in = new MyScanner();
 
	public static void main(String[] args) {
 
		String S = in.nextLine();
		boolean b =
				S.equals("hi")
				|| S.equals("hihi")
				|| S.equals("hihihi")
				|| S.equals("hihihihi")
				|| S.equals("hihihihihi");
		System.out.println(b ? "Yes" : "No");

	}
 
	public static class MyScanner{
		Scanner sc = new Scanner(System.in);
		String nextLine() {return sc.nextLine();}
		String next() {return sc.next();}
		int nextInt() {return Integer.valueOf(sc.next());}
		long nextLong() { return Long.valueOf(sc.next());}
	}
 
}