import re

def analizator_jezyka_naturalnego(text):
    hello = ['dzie[ńn] dobry', 'dobry wiecz[oó]r', 'witam', 'witaj', 'siema', 'elo', 'cze[śs][ćc]']
    request_name = ['imi[eę]', 'nazywasz']
    question = ['\?$']

    acts = {'hello': [hello],
            'request(name)': [request_name, question]}
    text = text_preprocess(text)
    frame = act_check(text)
    return frame

def text_preprocess(text):
    text = text.lower()
    return text

def act_check(text):
    frame = []
    for act, requirements in acts.items():
        req = [check_synonyms(synonyms, text) for synonyms in requirements]
        if all(req):
            frame.append(act)
    return frame

def check_synonyms(synonyms, text):
    for expression in synonyms:
        match = re.search(expression, text)
        if match:
            return True
    return False