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