char strfirst(char *s)
{
  return *s;
}

/* Above this line is the solution. */
/* Below this line is a sample program that checks the solution. */

void check(char *s)
{
  printf("The first character of %s is %c.\n",s,strfirst(s));
}

int main(void)
{
  check("less fried food");
  check("more aerobic exercise");
  return 0;
}