1ACCEPTED_NAMES = ['храст', 'bush', 'shrub']
 2
 3def is_a_valid_bush(argument):
 4    if type(argument) != dict:
 5        return False
 6    else:
 7        if not len(argument) or argument.get("name") is None:
 8            return False
 9        else:
10            return (lambda x: x.lower())(argument.get("name")) in ACCEPTED_NAMES
11
12def calculate_bush_price(argument):
13    return 0 if argument.get("cost") is None else argument.get("cost")
14
15def function_that_says_ni(*args, **kwargs) :
16    found_any_valid_bush = False
17    valid_bushes = list(filter(is_a_valid_bush, args))
18
19    if len(valid_bushes):
20        found_any_valid_bush = True
21
22    bushes_sum = sum(map(calculate_bush_price, valid_bushes))
23
24    letters_set= set()
25
26    for key, value in kwargs.items():
27        if not is_a_valid_bush(value):
28            continue
29        else:
30            found_any_valid_bush = True
31
32        for letter in key:
33            letters_set.add(letter)
34
35        bushes_sum += calculate_bush_price(value)
36
37    if not found_any_valid_bush or bushes_sum > 42 or int(bushes_sum) == 0 or len(letters_set) % int(bushes_sum) != 0:
38        return "Ni!"
39    else:
40        return f"{format(bushes_sum, ".2f")}лв"