Ключевые слова: address, airmail, bank, banking, bills, blank, business, card, celebration, communication, concept, correspondence, currency, data, delivery, document, email, empty, envelope, express, finance, information, invitation, isolated, letter, mail, mailing, message, money, note, object, office, open, package, page, paper, post, postage, postal, postcard, receive, send, service, stamp,