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9. Unfold the previous step.
10. Fold the right corner over to the left corner.
11. Unfold the previous step.
12. Flip the paper over to the other side.
13. Bring the left and right points forwards and down toward you.
14. Flatten the paper. This is now an origami preliminary base.
15. Fold the bottom right diagonal edge over to the left to align with the central vertical crease.
16. Open out the flap you just created.