Ключевые слова: absence, abstract, air, airy, blue, bright, clean, clear, clouds, communication, concept, correspondence, daytime, delivery, destination, document, dreamlike, envelope, ethereal, floating, flying, freedom, heavenly, idea, journey, letter, light, mail, message, minimalist, open, paper, peaceful, post, receiver, sender, serene, sky, sunny, surreal, symbolic, tranquil, travel, whimsical, white,