char* getInput()
{
  int length = 0;
  int input = 0;
  char *text = malloc(_STEP_ + 1);
  if (NULL==text)
    return NULL;
  while((input = getchar()) != EOF)
  {
    if ( (_STEP_ - 1) == (length % _STEP_) )
    {
      if (NULL == realloc(text, ( (length + 1) + _STEP_ + 1)))
      {
        free(text);
        return NULL;
      }
    }
    text[length] = input;
    length++;
  }
  text[length] = '\0';
  return text;
}