Ключевые слова: address, background, beautiful, box, closed, communication, contact, container, correspondence, deliver, delivery, design, document, element, grey, group, incoming, indoors, information, keyholes, letterbox, mail, mailbox, mailboxes, mailing, many, message, metal, new, news, newsletter, nobody, numbers, object, office, post, postage, postal, postbox, private, receive, receiving, room, send, sequence, service, shape,