def filterTweet(str1,str2,str3):
    PUNCTUATION = '!"$%\'()*+,-./:;<=>?[\\]^_`{|}~' + u"\u2014" + u"\u2026"

    STOP_WORDS_SHORT = set(["a", "an", "the", "this", "that", "of", "for", "or", "and", "on", "to", "be", "if", "we", "you", "in", "is", "at", "it", "rt", "mt"])

    STOP_WORDS = {"basic":STOP_WORDS_SHORT,

              "hrc":set(["clinton", "hillary", "tim", "timothy", "kaine"]).union(STOP_WORDS_SHORT),

              "djt": set(["donald", "trump", "mike", "michael", "pence"]).union(STOP_WORDS_SHORT),

              "both": STOP_WORDS_SHORT.union(set(["clinton", "hillary", "donald", "trump", "tim", "timothy", "kaine", "mike", "michael", "pence"])),

              "none": set([])}

    STOP_PREFIXES  = {"default": set(["@", "#", "http", "&amp"]),

                  "hashtags_only": set(["#"]),

                  "none": set([])}

    HRC_STOP_WORDS = STOP_WORDS["hrc"]

    DT_STOP_WORDS = STOP_WORDS["djt"]

    BOTH_CAND_STOP_WORDS = STOP_WORDS["both"]

    returnList = []

    for word in ((''.join((x for x in str1 if x not in PUNCTUATION))).split(' ')):
        if word.lower() not in STOP_WORDS[str2] and (word.lower())[0] not in STOP_PREFIXES[str3] and (word.lower())[:4] not in STOP_PREFIXES[str3]:
            returnList.append(word)
    return returnList

def main(s1,s2,s3):
    print filterTweet(s1,s2,s3)

hrctweet = "RT @HillaryforIA: The #iacaucus starts in 24 hours! #ImWithHer https://t.co/bF5fyfKbFt"

main(hrctweet, "basic", "default")