1def get_count_unique_letters_for_keys(**kwargs):
 2
 3    unique_letters = set()
 4    for key, value in kwargs.items():
 5        unique_letters.update(key)
 6
 7    return len(unique_letters)
 8
 9valid_bush_names = ['храст', 'bush', 'shrub']
10
11def function_that_says_ni(*args, **kwargs):
12    cost = 0
13    has_named = False
14
15    # execute for kwargs(named)
16    count = get_count_unique_letters_for_keys(**kwargs)
17
18    for name, dictionary in kwargs.items():
19        if 'name' in dictionary and dictionary.get('name').lower() in valid_bush_names: #Good bush
20            cost += dictionary.get('cost', 0)
21            has_named = True
22
23    # execute for args(positional)
24    for arg in args:
25        if type(arg) is not dict:
26            continue
27
28        dictionary = dict(arg)
29
30        if 'name' in dictionary and dictionary['name'].lower() in valid_bush_names:
31            cost += dictionary.get('cost', 0)
32
33    if cost == 0 or cost > 42:
34        return 'Ni!'
35    if has_named and count % (cost // 1) != 0:
36        return 'Ni!'
37
38    return f'{cost:.2f}лв'