/******************************************************************************
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*******************************************************************************/
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <stdlib.h>
#define N 255
int main()
{
char buf[N] = {};
int len;
printf("Enter: ");
fgets(buf, N, stdin);
len = strlen(buf);
for(int i = 0; i < len; i++)
{
if (isalpha(buf[i]))
buf[i] = tolower(buf[i]);
}
if (strncmp(buf, "hi!", 3) == 0)
printf("YES\n");
else
printf("NO\n");
return 0;
}
