def getSentence(words):
    """
    Forms a sentence from a list of words. If more than one element, the last one will have an 'and'
    """
    if len(words) == 0:
        return ""
    elif len(words) == 1:
        return words[0]

    return "{} and {}".format(", ".join([str(w) for w in words[:-1]]), str(words[-1]))