1def function_that_says_ni(*args, **kwargs):
 2
 3    BUSH_VALUES_LOWER = ("храст", "shrub", "bush")
 4
 5    summation = 0
 6
 7    used_letters = set();
 8
 9
10    for value in args:
11
12        if isinstance(value, dict) and isinstance(name := value.get("name"), str) and name.lower() in BUSH_VALUES_LOWER:
13
14            if(price := value.get("cost")):
15
16                summation += price
17
18
19    for key, value in kwargs.items():
20
21        if isinstance(value, dict) and isinstance(name := value.get("name"), str) and name.lower() in BUSH_VALUES_LOWER:
22
23            used_letters |= set(key)
24
25            if price := value.get("cost"):
26
27                summation += price
28
29    floored_price = int(summation)
30    
31    is_valid_letter = lambda x: isinstance(x, str) and (x.islower() or x == '_')
32    
33    number_of_unique_letters = sum(1 for letter in used_letters if is_valid_letter(letter))
34    
35    if(summation > 42 or floored_price == 0 or number_of_unique_letters % floored_price != 0):
36        return "Ni!"
37
38
39    return f"{summation:.2f}лв"