def make_normal(corpus):
    def remove_dog(corpus):
        for i in range(len(corpus)):
            split = corpus[i].split()
            for j in range(len(split)):
                if split[j][0] == '@':
                    split.remove(split[j])
                    break
            corpus[i] = ' '.join(split)

    def remove_dots(corpus):
        for i in range(len(corpus)):
            corpus[i] = corpus[i].lower()
            corpus[i] = corpus[i].replace(',', '').replace('.', '').replace('-', '').replace(';', '').replace('"', '').replace("'", '').replace('!', '')

    def correct_words(corpus):
        lemma = MorphAnalyzer()
        for i in range(len(corpus)):
            split = corpus[i].split()
            for j in range(len(split)):
                split[j] = lemma.parse(split[j])[0].normal_form
            corpus[i] = ' '.join(split)

    remove_dog(corpus)
    remove_dots(corpus)
    correct_words(corpus)

    return 'Done!'

make_normal(corpus)
make_normal(test)