Ключевые слова: abstract, arrangement, background, black, black hole, business, challenge, closeup, collaboration, complete, concept, cooperation, copy space, defect, difficulty, final, find solution, game, gray, idea, incomplete, jigsaw, marketing, match, mental health, metaphor, missing, mission, network, part, partnership, pattern, piece, play, problem, psychology, puzzle, puzzle background, question, simple, solution, space, strategy, stress, success, support, symbol, teamwork, unfinish, white,