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 c;
  cin >> c;
  if (c=="hi"||c=="hihi"||c=="hihihi"||c=="hihihihi"||c=="hihihihihi"){
    cout <<"Yes" <<endl;
  } else {
    cout <<"No" <<endl;
  }

return 0;



}