Ключевые слова: address, arrive, await, blue, box, card, communication, concept, container, correspondence, deliver, delivery, document, email, empty, envelope, express, flag, icon, illustration, inside, isolated, letter, letterbox, mail, mailbox, mailman, message, metal, news, open, package, paper, post, postage, postal, postbox, receive, red, send, service, shipment, sign, stamp, standard, symbol, white,