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― Configuration code: RRmUmLvDvLmUUv
- Start from
- Close both flaps against opposite sides (west and east) of the "tube"
- Move lower tile of the East wall towards the lonely tile of the south wall
and change their hinging side
- Simultaneously push apart the two lower tiles of the West wall (also changing
their hinging side, hence hinging about their upper side, some stretching involved)
- Finally open the flap to obtain the final shape.