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 <iostream>
using namespace std;

int main()
{
	string s;
	cin >> s;
	string hi = "hi";
	int i = 0;
	for (i = 0; i < 5; i++){
		if (s != hi) hi += "hi";
		else break;
	}

	if (i == 5) cout << "No" << endl;
	else cout << "Yes" << endl;
}
