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

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• Start from
• Turn 90 degrees a flap tile towards the inside of a corner of three tiles. This can be done in two ways (chosing either flap tile), chose the one that creates a new flap
• Turn 90 degrees the newly created flap into the final shape