Hidden cube

      The elements of a puzzle are the cube 3x3x3 (A) and cubes of the same size. In there angular part parallelepipeds are cut out: 1x1x1 (B), 1x1x2 (C), 1x2x2 (D) and 2x2x2 (E).
      The task 1. From elements of a puzzle collect a cube so that the small cube (A) is hidden inside the large cube.
      The task 2. Collect the large cube with the beforehand chosen element inside.
      The task 3. Scatter cubes on a table, choose any element of a puzzle and fix it in space, and then hide it inside the collected cube. Use for collecting of a "shell" remained elements.

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