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>
int main(void){
    char S[10+1];
    scanf("%s",S);
    if((S[0]=='h')&&(S[1]=='i')||(S[2]=='h')&&(S[3]=='i')||(S[4]=='h')&&(S[5]=='i')||(S[6]=='h')&&(S[7]=='i')||(S[8]=='h')&&(S[9]=='i')){
        printf("Yes\n");
    }else if((S[0]!='h')||(S[1]!='i')||(S[2]!='h')||(S[3]!='i')||(S[4]!='h')||(S[5]!='i')||(S[6]!='h')||(S[7]!='i')||(S[8]!='h')||(S[9]!='i')){
        printf("No\n");
    }

}