Problem:
Score : 100 points

Problem Statement

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.

Sample Input 1

hihi

Sample Output 1

Yes

hihi is the concatenation of two copies of hi, so it is a Hitachi string.

Sample Input 2

hi

Sample Output 2

Yes

Sample Input 3

ha

Sample Output 3

No

Solution in C (GCC 5.4.1) (judge verdict: Wrong Answer)

#include <stdio.h>
#include <string.h>
 
 int main(void)
{
  char str1[] = "S";
  char str2[] = "hi";
  char str3[] = "hihi";
  char str4[] = "hihihi";
  char str5[] = "hihihihi";
  char str6[] = "hihihihihi";
 
  
  if((strcmp(str1,str2) == 0)
    ||(strcmp(str1,str3) == 0)
    ||(strcmp(str1,str4) == 0)
    ||(strcmp(str1,str5) == 0)
    ||(strcmp(str1,str6) == 0)) {
    printf("Yes");
  } else {
    printf("No");
  }
  
    return 0;
}