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
#include<bits/stdc++.h>
int main() {
	int arr[26]{};
	std::string name;
	std::cin >> name;
	int n=name.size();
	bool yes = 1;
	for (int x = 0; x < n; x += 2) {
		if (name.substr(x, 2) != "hi") {
			yes = false;
		}
	}
	std::cout << (yes == 1 ? "Yes" : "No");

}