<ul>
<li>Start from RRULvUvDUmLv
<li>Rotate about the vertical axis such that the flap tile points north
<li>valley fold the two southern horizontal tiles together with the north vertical
tile, simultaneously fold the vertical wall of two tiles such that the common hinge
moves towards east
<li>We arrive to a 2x2 square with a stack of three tiles in the south-east position,
stacks of two tiles in the north-west and south-west positions
<li>reopen changing the hinging of the bottom two tiles in the south-east position
<li>continuing with the movement we arrive at a 2x2 square with a single tile at
the south-west position, stack of two tiles in the remaining positions and a
single flap tile that sticks out north of the square
<li>reopen changing the hinging side of the south-east stack and turning the
flap tile above the stack of two tiles (north-west).
The north-east tiles hinge around their east side, the lower of these tiles
must be forced on top of the west tiles (this require some stretching)
<li>We arrive at the final shape.
</ul>