Ключевые слова: abstract, aerial, arrow, black, blackboard, board, business, canoe, chalk, chalkboard, color, colorful, concept, croatia, diagram, double, drawing, drone, education, europe, football, green, illustration, jarun, kayak, lake, landscape, math, mathematics, nature, oasis, overhead, paddle, plan, pond, prepared, ready, river, school, sign, sport, spring, strategy, success, surface, symbol, water, white, zagreb,