Ключевые слова: a to b, aim, background, begin, billboard, blackboard, brush, chalk, chalkboard, challenge, chaos, coaching, complicated, concept, confused, curve, decision, difficult, drawing, drawn, easy, goal, graphic, grunge, hand, handwriting, illustration, knot, letter, orange, plan, problem, route, shortcut, shortest, simplify, sketch, solution, solve, straight, strategy, way, wire, yellow,