Ключевые слова: box, boxes, busy, communicate, communication, community, compartment, correspond, correspondence, deliver, door, email, envelope, fedex, inbox, letter, lock, locked, mail, mailbox, mailboxes, mailroom, media, metal, number, numbers, office, order, outbox, paper, parcel, pattern, post, postage, poste, postman, postoffice, privacy, receive, route, send, sent, sign, snail, stamp, steel, ups, write, writing,