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1. Start from ,
2. place it with the missing corner at the north-west position and the south-west tile of "backslash" type.
3. turn up 180 degrees (valley fold) the right column of three tiles about a vertical line
4. Open in
5. rotate clockwise 90 degrees the flap in the back against the front flap
6. change the hinging side and open
7. Turn two tiles in the final shape