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