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

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Hinge equivalent to

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Alternative construction (more involved):

• Start from I-2 .
• Fold the two stacked lower tiles in between the two (stacked) tiles above, obtaining a 3x1 rectangle with a stack of four tiles in the lowest position.
• Turn left 180 degrees the top layer of three tiles.
• Open into , hinge equivalent to the requested shape.