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>
using namespace std;
int main()
{
  string r;
  cin>>r;
  int n=r.size();
  if(n%2){
    cout<<"No";
  }
  else{
    string t="";
    for(int i=1;i<=n/2;++i)t+="hi";
    cout<<((t==r)?"Yes":"No");
  }
  return 0;
}