Ключевые слова: blank, blue, book, brown, closed, college, cover, diary, dictionary, document, education, empty, format, hardcover, history, information, isolated, isometric, knowledge, learn, learning, library, literary, literature, novel, object, old, open, page, paper, reading, retro, school, solid, studying, symbol, textbook, threedimensional, tridimensional, university, wisdom,