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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def normalize(alias):
 """ Normalizes an alias by removing adverbs defined in IGNORED_WORDS """

    # Convert from CamelCase to snake_case
    alias = re.sub(r'([a-z])([A-Z])', r'\1_\2', alias)
    # Ignore words
    words = alias.lower().split('_')
    words = filter(lambda w: w not in IGNORED_WORDS, words)
    return '_'.join(words)