#include <stdlib.h>
#include <ctype.h>
int main ()
{
char* buf = "hello";
return ! ((toupper (buf[0]) == 'H' && toupper ('z') == 'Z' &&
tolower (buf[4]) == 'o' && tolower ('X') == 'x' &&
isdigit (buf[3])) == 0 && isalnum ('4'));
}