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
import java.util.*;
import java.io.*;

public class Main {

  void solve(InputReader in, PrintWriter out) {
    char[] o = "hi".toCharArray();
    char[] arr = in.next().toCharArray();

    int i = 0;
    int j = 0;

    for (char c : arr) {
      if (c != o[i++]) {
        out.println("No");
        return ;
      }
      i %= o.length;
    }

    if (i != 0) {
      out.println("No");
    } else {
      out.println("Yes");
    }
    
  }

  public static void main(String[] args) throws Exception {
    InputReader in = new InputReader(System.in);
    PrintWriter out = new PrintWriter(System.out);
    Main solver = new Main();
    solver.solve(in, out);
    out.close();
  }

  static class InputReader {
    BufferedReader in;
    StringTokenizer st;

    public InputReader(InputStream is) {
      in = new BufferedReader(new InputStreamReader(is));
    }

    public String next() {
      try {
        while (st == null || !st.hasMoreTokens()) {
          st = new StringTokenizer(in.readLine());
        }
        return st.nextToken();
      } catch (Exception e) {
        throw new RuntimeException(e);
      }
    }

    public int nextInt() {
      return Integer.parseInt(next());
    }

    public long nextLong() {
      return Long.parseLong(next());
    }
  }
}
