def set_dictionary(filename):
  """
  Load the specified file as the dictionary, overwriting any previous dictionaries.
  """
  pass

def add_dictionary(filename):
  """
  Add the words in the specified file to the dictionary.
  """
  pass

def add_to_dictionary(word):
  """
  Add the argument to the dictionary.
  """
  pass

def delete_from_dictionary(word):
  """
  Remove the argument from the dictionary.
  """
  pass

def ignore_word(word):
  """
  Do not find this word as misspelled until the spellchecker exits or is
  reloaded, even though it is not in the dictionary.
  """
  pass

def find_alternate_words(word):
  """
  Return a list of the closest matches if the word is not in the dictionary,
  or an empty list if it is.
  """
  pass

def spellcheck_text(document_string, index):
  """
  Starting at character <index>, and taking non-letter characters such as
  punctuation or whitespace to be dividers between words, return the position 
  of the first character of the first word in the list not in the dictionary, 
  or -1 if no such words are found.
  """
  pass