Ключевые слова: abstract, background, black, border, business, chalk, chalkboard, challenge, charcoal, competition, concept, crayon, crosses, doodle, draw, drawing, education, frame, game, graphical, graphics, graphite, hand, handdrawn, handmade, illustration, isolated, leisure, line, manually, monochrome, noughts, pastel, pattern, pen, pencil, scrawl, scribble, simple, sketch, sketching, strategy, tac, texture, think, tic, tictactoe, toe, white, win,