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>
#include <string>
using namespace std;
int main()
{
  string t;
  string r;
  string s;
  cin >> t;
  int l=t.size()/2;
  for(int i = 0; i < l; i++){
    s+="hi";
  }
  if(s==t)
    r="Yes";
  else
    r="No";
  
  cout << r << endl;
  return 0;
}
