(:trajectory

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(:action (unstack b7 b4))

(:state (clear b2) (clear b4) (clear b5) (clear b8) (holding b7) (on b2 b9) (on b3 b1) (on b5 b6) (on b6 b3) (ontable b1) (ontable b4) (ontable b8) (ontable b9))

(:action (stack b7 b2))

(:state (clear b4) (clear b5) (clear b7) (clear b8) (handempty) (on b2 b9) (on b3 b1) (on b5 b6) (on b6 b3) (on b7 b2) (ontable b1) (ontable b4) (ontable b8) (ontable b9))

(:action (pick_up b8))

(:state (clear b4) (clear b5) (clear b7) (holding b8) (on b2 b9) (on b3 b1) (on b5 b6) (on b6 b3) (on b7 b2) (ontable b1) (ontable b4) (ontable b9))

(:action (stack b8 b7))

(:state (clear b4) (clear b5) (clear b8) (handempty) (on b2 b9) (on b3 b1) (on b5 b6) (on b6 b3) (on b7 b2) (on b8 b7) (ontable b1) (ontable b4) (ontable b9))

(:action (unstack b5 b6))

(:state (clear b4) (clear b6) (clear b8) (holding b5) (on b2 b9) (on b3 b1) (on b6 b3) (on b7 b2) (on b8 b7) (ontable b1) (ontable b4) (ontable b9))

(:action (put_down b5))

(:state (clear b4) (clear b5) (clear b6) (clear b8) (handempty) (on b2 b9) (on b3 b1) (on b6 b3) (on b7 b2) (on b8 b7) (ontable b1) (ontable b4) (ontable b5) (ontable b9))

(:action (unstack b6 b3))

(:state (clear b3) (clear b4) (clear b5) (clear b8) (holding b6) (on b2 b9) (on b3 b1) (on b7 b2) (on b8 b7) (ontable b1) (ontable b4) (ontable b5) (ontable b9))

(:action (stack b6 b4))

(:state (clear b3) (clear b5) (clear b6) (clear b8) (handempty) (on b2 b9) (on b3 b1) (on b6 b4) (on b7 b2) (on b8 b7) (ontable b1) (ontable b4) (ontable b5) (ontable b9))

(:action (unstack b3 b1))

(:state (clear b1) (clear b5) (clear b6) (clear b8) (holding b3) (on b2 b9) (on b6 b4) (on b7 b2) (on b8 b7) (ontable b1) (ontable b4) (ontable b5) (ontable b9))

(:action (stack b3 b6))

(:state (clear b1) (clear b3) (clear b5) (clear b8) (handempty) (on b2 b9) (on b3 b6) (on b6 b4) (on b7 b2) (on b8 b7) (ontable b1) (ontable b4) (ontable b5) (ontable b9))

(:action (pick_up b1))

(:state (clear b3) (clear b5) (clear b8) (holding b1) (on b2 b9) (on b3 b6) (on b6 b4) (on b7 b2) (on b8 b7) (ontable b4) (ontable b5) (ontable b9))

(:action (stack b1 b8))

(:state (clear b1) (clear b3) (clear b5) (handempty) (on b1 b8) (on b2 b9) (on b3 b6) (on b6 b4) (on b7 b2) (on b8 b7) (ontable b4) (ontable b5) (ontable b9))

(:action (pick_up b5))

(:state (clear b1) (clear b3) (holding b5) (on b1 b8) (on b2 b9) (on b3 b6) (on b6 b4) (on b7 b2) (on b8 b7) (ontable b4) (ontable b9))

(:action (stack b5 b1))

(:state (clear b3) (clear b5) (handempty) (on b1 b8) (on b2 b9) (on b3 b6) (on b5 b1) (on b6 b4) (on b7 b2) (on b8 b7) (ontable b4) (ontable b9))

(:action (unstack b3 b6))

(:state (clear b5) (clear b6) (holding b3) (on b1 b8) (on b2 b9) (on b5 b1) (on b6 b4) (on b7 b2) (on b8 b7) (ontable b4) (ontable b9))

(:action (put_down b3))

(:state (clear b3) (clear b5) (clear b6) (handempty) (on b1 b8) (on b2 b9) (on b5 b1) (on b6 b4) (on b7 b2) (on b8 b7) (ontable b3) (ontable b4) (ontable b9))

(:action (unstack b6 b4))

(:state (clear b3) (clear b4) (clear b5) (holding b6) (on b1 b8) (on b2 b9) (on b5 b1) (on b7 b2) (on b8 b7) (ontable b3) (ontable b4) (ontable b9))

(:action (stack b6 b5))

(:state (clear b3) (clear b4) (clear b6) (handempty) (on b1 b8) (on b2 b9) (on b5 b1) (on b6 b5) (on b7 b2) (on b8 b7) (ontable b3) (ontable b4) (ontable b9))

(:action (pick_up b3))

(:state (clear b4) (clear b6) (holding b3) (on b1 b8) (on b2 b9) (on b5 b1) (on b6 b5) (on b7 b2) (on b8 b7) (ontable b4) (ontable b9))

(:action (stack b3 b6))

(:state (clear b3) (clear b4) (handempty) (on b1 b8) (on b2 b9) (on b3 b6) (on b5 b1) (on b6 b5) (on b7 b2) (on b8 b7) (ontable b4) (ontable b9))

(:action (pick_up b4))

(:state (clear b3) (holding b4) (on b1 b8) (on b2 b9) (on b3 b6) (on b5 b1) (on b6 b5) (on b7 b2) (on b8 b7) (ontable b9))

(:action (stack b4 b3))

(:state (clear b4) (handempty) (on b1 b8) (on b2 b9) (on b3 b6) (on b4 b3) (on b5 b1) (on b6 b5) (on b7 b2) (on b8 b7) (ontable b9))

)