Ключевые слова: analysis, back, background, bad, bear, black, blackboard, board, business, candle, caucasian, chalk, chalkboard, chart, concept, down, drawing, economy, education, elearning, exchange, finance, financial, forex, graph, growth, illustration, investment, lady, learning, loose, market, people, person, sketch, stock, student, study, teaching, trade, trading, trend, woman, writing, young,