def spellcheck(str):
	"""Take the string str and print out each misspelled word, or 'passed'
	if all words are spelled correctly."""
	pass

def checkwrd(wrd):
	"""Take a word and return 1 if it is spelled correctly, otherwise
	return 0.  This function is called by spellcheck on each word."""
	pass

def findword(wrd):
	"""Open up the dictionary file and return 1 if the word was found
	in the dictionary, 0 if not.  Called on by checkwrd."""
	pass

def isword(wrd):
	"""Return 1 if wrd is a valid word (a string of characters made up of
	only letters), 0 if not.  Called by checkwrd."""
	pass

def removeword(wrd):
	"""Call on isword and findword to find out if wrd is a dictionary
	entry, and remove it if it is.  Otherwise print out an error message. 
	This modifies the dictionary file."""
	pass

def addword(wrd):
	"""Call on isword to see if wrd is a valid word, then call findword to
	see if it is in the dictionary.  If not, add it to the dictionary, if
	it is already there print out '<wrd> is already in the dictionary.'
	This modifies the dictionary file."""
	pass