rubiks cube memory model

---3x3 cube memory model---

   000          top face
   000
   000
111222333444    left, front, right back
111222333444
111222333444
   555          bottom face
   555
   555

Example command: R1 (turn right face clockwise once)
Memory after command:

   002
   002
   002
111225333044
111225333044
111225333044
   554
   554
   554