Ключевые слова: address, background, blank, blue, business, card, color, colorful, communication, concept, correspondence, delivery, design, different, document, drawing, email, empty, envelope, envelopes, flat, green, greeting, group, information, invitation, isolated, letter, mail, mailing, message, object, office, open, paper, pink, post, postage, postal, postcard, receive, send, set, stack, template, top, view, white, write, yellow,