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― Configuration code: RRmURUmDUvRv
construction notes
- from
(symmetric gray box 1x2x3+1)
- flatten into flat 1x3 rectangle with one stack of four
(right) and two stacks of 2 (left and middle)
- open into a 2x3 (flat) rectangle, place it so that the two stacks of
two tiles are on the right and the prodruding tiles are on top.
- turn these two right stacks down 180 degrees with a vertical
mountain fold into a 2x2 (flat) square
- turn the square upside-down and lift the tiles into 3D into
the required shape
