from collections import Counter
import json


def get_txt(fn):
    with open(filename, encoding="utf-8") as f:
        return json.load(f)


def sort(fn):
    i = 0
    forbidden = ('!', '?', '.', ' ', '.', ',', '?', '(', ')', '-')  # без '-' все работает хорошо
    something = get_txt(fn).lower().split()

    while i < len(something):
        if something[i] in forbidden:
            something = something.replace(something[i], '')
            i += 1
        else:
            i += 1
    return something


filename = 'user.json'
word_list = sort(filename)
print(Counter(word_list))