Ключевые слова: address, architecture, background, box, closed, colorless, communication, correspondence, delivery, detail, drop, education, furniture, hole, interior, internal, keyhole, letter, letterbox, lock, locker, mail, mailbox, many, metal, metallic, number, office, paper, post, postal, postbox, public, row, safe, secure, security, send, slot, sort, storage, urban, view, vintage, wall,