[B1 ON B4] 400001
  |- PLACE B3 ON TABLE 400002
  |  |- take b4 off table 6
  |  |- take b5 off table 6
  |  -- PICK UP B2 FROM B1 500005
  |     |- PLACE B2 ON TABLE 500006
  |     |  |- TAKE B1 OFF TABLE 500007
  |     |  |  |- put b1 on b2 7
  |     |  |  |- put b1 on b3 7
  |     |  |  |- put b1 on b4 5
  |     |  |  -- put b1
  |     |  |- take b3 off table 7
  |     |  |- take b4 off table 7
  |     |  -- take b5 off table 7
  |     |- put b2 on b3 5
  |     |- put b2 on b4 6
  |     -- put b2 on b5 5
  |- put b3 on b2 400003
  |  |- take b4 off table 6
  |  -- take b5 off table 6
  |- put b3 on b4 5
  -- put b3 on b5 400004
     |- take b4 off table 6
     -- pick up b2 from b1 5