1BUSH_NAMES = ["храст", "shrub", "bush"]
 2MAX_ACCEPTABLE_PRICE = 42.00
 3KNIGHT_MESSAGE = "Ni!"
 4
 5def is_bush(bush_candidate):
 6    if type(bush_candidate) != dict:
 7        return False
 8    if "name" not in bush_candidate.keys():
 9        return False
10    if bush_candidate["name"].lower() not in BUSH_NAMES:
11        return False
12    return True
13
14def function_that_says_ni(*args, **kwargs):
15    cost_of_bushes = 0.0
16    used_letters = set()
17    has_bushes = False
18
19    for potential_bush in args:
20        if is_bush(potential_bush):
21            cost_of_bushes += potential_bush.get("cost", 0)
22            has_bushes = True
23
24    for bush_name, potential_bush in kwargs.items():
25        if is_bush(potential_bush):
26            cost_of_bushes += potential_bush.get("cost", 0)
27            has_bushes = True
28            used_letters.update(bush_name)
29
30    if not has_bushes:
31        return KNIGHT_MESSAGE
32    if cost_of_bushes > MAX_ACCEPTABLE_PRICE:
33        return KNIGHT_MESSAGE
34    if int(cost_of_bushes) == 0:
35        return KNIGHT_MESSAGE
36    if len(used_letters) % int(cost_of_bushes) != 0:
37        return KNIGHT_MESSAGE
38    return f"{cost_of_bushes:.2f}лв"