[previous configuration] [up to this 3D shape] [next configuration] ― Configuration code: RmUmRvUvUmLvUmLv

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• Start from
• Close the hole by pushing the two external tiles of the tube against the two internal tiles
• This creates two flap tiles, to be rotated 90 degrees
• After rotation one of the tiles moves against another tile, that becomes a flap
• Rotate this latter flap 90 degrees in the final position