def add_own_book(library):
    while True:
        own_book = input("enter the name of book you own ( press enter to skip ): ")
        if own_book and own_book not in library:
            library.append(str(own_book))
        else:
            break

    return library


def add_wish_book(wish_books):
    while True:
        wish_book = input("enter the name of book you wish to have ( press enter to skip ): ")
        if wish_book and wish_book not in wish_books:
            wish_books.append(str(wish_book))
        else:
            break

    return wish_books

def print_BooksList(BooksList):
    for i,book in enumerate(BooksList):
        print(f"{i+1}- {book}")




library = []
wish_books = []
books_to_donate = []

print("\nWelcome to your library\n")
# Add books to library
add_own_book(library)
print("\nyour library now contains: ")
print_BooksList(library)

# Add books you wish to have
add_wish_book(wish_books)

print("\nyour wish list now contains: ")
print_BooksList(wish_books)

print("\n")

# Add books that you wished to have and you acquired them
while True:
    book_wish_have = input("enter book from wish list that you have acquired (press enter to skip): ")
    if book_wish_have in wish_books:
        wish_books.remove(str(book_wish_have))
        library.append(str(book_wish_have))
    else:
        # means user pressed enter without entering any book
        break


# Add books to donate
while True:
    donat_book = input("\nenter name of you library you wish to donate (press enter to skip): ")
    if donat_book:
        books_to_donate.append(str(donat_book))
        library.remove(str(donat_book))
    else:
        # means user pressed enter without entering any book
        break


print("\nyour library now contains: ")
print_BooksList(library)

print("\nyour wish list now contains: ")
print_BooksList(wish_books)

print("\nyour books to donate now contains: ")
print_BooksList(books_to_donate)