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

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• Start from
• Close into a 3x2 rectangle with stacks of two tiles at opposite corners
• Change hinging side in one of the two stacks from a lateral side to a horizontal side lying at the boundary of the 3x2 rectangle
• Open into the final shape