1def function_that_says_ni(*args, **kwargs):
 2    valid_values_for_names = {"храст", "shrub", "bush"}
 3    total_price = 0.0
 4    key_characters = set()
 5
 6    for arg in args:
 7        if isinstance(arg, dict) and "name" in arg and arg["name"].lower() in valid_values_for_names:
 8            total_price += arg.get("cost", 0)
 9
10    for key, value in kwargs.items():
11        if isinstance(value, dict) and "name" in value and value["name"].lower() in valid_values_for_names:
12            total_price += value.get("cost", 0)
13            key_characters.update(key)
14
15    if total_price > 42.00:
16        return "Ni!"
17
18    unique_letters_count = len(set(key_characters))
19
20    integer_price = int(total_price)
21
22    if integer_price == 0 or unique_letters_count % integer_price != 0:
23        return "Ni!"
24    else:
25        return f"{total_price:.2f}лв"