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

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• Start from
• Position as a 2x4 rectangle with the South-West tile of type slash
• Fold down 180 degrees the two West tiles (mountain fold)
• Rotate 180 degrees the flap tile located at the bottom (first floor) of the South-West stack
• Lift the bridge in the final shape