Catalogue

class Catalogue:
    products=[]

    def __init__(self, name:str):
        self.name = name

    def add_product(self, product_name:str):
        Catalogue.products.append(product_name)

    def get_by_letter(self, first_letter:str):
        return [s for s in Catalogue.products if s.startswith(first_letter)]

    def __repr__(self):
        returned_string = f"Items in the {self.name} catalogue:\n"
        returned_string += '\n'.join(sorted(Catalogue.products))
        return returned_string