((
  close(d11),
  open(d11),
  move(r1, c1),
  move(c1, c2),
  move(c2, r3),
  close(d23), 
  open(d23), 
  move(r3, c2),
  move(c2, c1),
  move(c1, r1)
 ),
 0
)