Ключевые слова: abc, abstract, algebra, backdrop, background, black, count, decoration, design, digit, education, eight, fabric, figure, five, font, four, graphic, infinity, learn, letter, math, mathematics, nine, number, numeral, one, pattern, print, repeat, school, seamless, seven, six, statistics, symbol, text, texture, three, tile, two, type, wallpaper, white, zero,