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― Configuration code: RRmRRmDmURDm
- Start from
- Close it into a flat 3x1 sequence of stacked tiles: two in the northern
position, four in the central position, including the two flaps (hinged about their north side), two in the southern position
- Open in 3D by hinging the central and southern tiles about a vertical (east
or west)
side, the northern tiles about the north side.
