Ключевые слова: achievement, answer, arrow, attempt, black, blackboard, board, chalkboard, challenge, communication, complete, concept, connection, difficult, difficulty, drawing, finding, fit, font, game, idea, illustration, intelligence, join, link, match, metaphor, missing, part, piece, problem, puzzle, search, shape, signs, skill, solution, solution concept business, solve, strategy, success, symbol, toy, try, unity,