<ul>
<li>Start from RUmRUvUmDvUvDv
<li>Close in a 2x2 square by <i>pocketing</i> two of the four tiles forming the ring
(those on top and in the left with respect to the figure),
the 2x2 square has a stack of four tiles in the South-East position,
and a stack of two tiles in the North-East position.
<li>Lift in vertical position the top two tiles in the SE stack.
<li>Open in 3D with the following choice of hinges:
<ul>
<li>The two vertical tiles about their vertical West side
<li>The two stacked SE tiles about their South side
<li>The two stacked NE tiles about their East side
<li>slightly fold the two West tiles with a valley fold
between each other and a mountain fold about the East tiles.
</ul>
</ul>