Ключевые слова: air, approve, back, background, blue, business, clear, closeup, communication, confident, confirm, document, envelope, fail, file, guarantee, ink, isolated, letter, list, macro, mail, modern, negative, office, paper, plastic, post, postage, postal, postbox, postcard, postman, quality, reject, rejected, rejection, return, rubber, secretary, send, sent, stamp, stationery, tool, white, word,