1def function_that_says_ni(*args, **kwargs):
 2    costs = 0
 3    unique_letters = set()
 4
 5    for el in args:
 6        if type(el) == dict:
 7            for key, value in el.items():
 8                if key == 'name':
 9                    if value.lower() not in ('храст', 'shrub', 'bush'):
10                        break
11                if key == 'cost':
12                    costs += round(value, 2)
13    
14    for key, value in kwargs.items():
15        if type(value) == dict:
16            for inner_key, inner_value in value.items():
17                if inner_key == 'name':
18                    if inner_value.lower() not in ('храст', 'shrub', 'bush'):
19                        break
20                if inner_key == 'cost':
21                    costs += round(inner_value, 2)
22            for letter in key:
23                if letter not in unique_letters:
24                    unique_letters.add(letter)
25
26    letters_count = len(unique_letters)    
27
28    if costs <= 42.00 and not int(costs) == 0:
29        if not letters_count % int(costs):
30            return '{:.2f}'.format(costs) + 'лв'
31
32    return 'Ni!'