1def is_valid_bush(potential_bush):
 2    valid_keys = ('храст', 'shrub', 'bush')
 3
 4    if type(potential_bush) is dict:
 5        if 'name' in potential_bush:
 6            if potential_bush['name'].lower() in valid_keys:
 7                return True
 8    return False
 9
10
11def not_too_expensive(total_cost):
12    max_cost = 42.00
13    return total_cost <= max_cost
14
15
16def one_that_looks_nice(unique_letters, total_cost):
17    integer_cost = int(total_cost)
18    return integer_cost != 0 and len(unique_letters) % integer_cost == 0
19
20
21def function_that_says_ni(*args, **kwargs):
22    total_cost = 0.00
23    unique_letters = set()
24
25    for arg in args:
26        if is_valid_bush(arg):
27            total_cost += arg.get('cost', 0)
28
29    for key, value in kwargs.items():
30        if is_valid_bush(value):
31            current_letters = set(key)
32            unique_letters |= current_letters
33            total_cost += value.get('cost', 0)
34
35    if not_too_expensive(total_cost) and one_that_looks_nice(unique_letters, total_cost):
36        return f'{total_cost:.2f}лв'
37
38    else:
39        return 'Ni!'