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>

int main() {
  std::string s;
  std::cin >> s;

  for (int i = 0; i < s.size(); i += 2) {
    if (s.substr(i, 2) != "hi") {
      std::cout << "No" << std::endl;
      return 0;
    }
  }

  std::cout << "Yes" << std::endl;
  return 0;
}
