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― Configuration code: RmRvUmUvDmRmRvUm
- Start from
- Lower 90 degrees the vertical fin into a flat shape (one goes on top of the flap tile)
- The rotated tiles both become flaps, turn 180 degrees the one that is not at a corner position
- The resulting shape is a 3x2 rectangle with a stack of three tiles in the north-east corner
- Open in 3D by hinging the two highest tiles of the stack about their east side while turning down the
bottom tile of the stack (a flap) 90 degrees
- Obtain in this way the final shape