Ключевые слова: achievement, answer, business, challenge, clarification, combined, complete, completion, concept, conceptual, difficulty, education, effect, elucidation, explanation, fill, filter, finish, finishing, innovation, integration, jigsaw, joining, last, lifestyle, metaphor, missing, piece, problem, professional, puzzle, resolve, retro, solution, solve, solving, standing, success, successful, symbol, system, unfolding, upright, vintage, white,