def lookup(word):
    """Scan the current dictionary for word, report a spelling error if not found"""
    pass

def check(chunk):
    """Tokenize chunk into words and use lookup() to spell check them"""" 
    pass

def add(key, dict):
   """Add key to dictionary dict"""
   pass

def remove(key,dict):
    """Remove key from dictionary dict"""
    pass

def setdict(dict):
    """Set the current dictionary  to dict"""
    pass