Ключевые слова: 3d, abstract, assemble, background, blank, blue, business, challenge, concept, conceptual, connect, connection, difficulty, element, fit, game, gray, hole, horizontal, idea, illustration, incomplete, jigsaw, join, last, link, match, metaphor, missing, nobody, objects, one, part, pattern, piece, pieces, problem, puzzle, shape, skill, solution, solve, strategy, success, texture, toy, vertical, white,