Solid 3.5ominoes with Holes

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Construct two solid trominoes of unit height and attach a unit cube to their vertical surfaces. If this cube can be divided diagonally with a single cut, you will obtain twenty distinct pieces that can be used to create flat and three-dimensional configurations. Since faces at a forty-five degree angle cannot be placed on top of one another, small holes are incorporated into these faces to facilitate connection by means of small boxes, thereby preventing the pieces from sliding downward.