<ul>
<li>Start from L1 of [Nourse]
<li>turn right 180 degrees the upper three tiles (second floor) on the western stacks
<li>turn down (valley fold) 180 degrees the two north tiles
<li>open in 3D in the final shape with the following hinging
 <ul>
  <li>North-west stack: west side
  <li>North-east stack: north side
  <li>South-east stack: south side between first and second floor, west side between second and third floor
  <li>Valley fold 90 degrees between south and north tiles (both west and east)
 </ul>
</ul>