|Step 13: Unfold the front flap and inside reverse fold it as shown. Don't pull it all the back, but pull it about 1/3rd behind the corner of the above triangle.|
|Step 14: Inside reverse fold the other flap.|
|Step 15: Take the top layer of the lower left triangle and fold it up, then unfold. The crease helps for the next step.|
|Step 16: Open the top layer and tuck in (inside reverse fold) the previously folded triangle.|
|Step 17: Fold up and unfold the second lower left triangle also.
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