Cat [
      Cell 0 11
    , (Cell -2 11)
    , (Cell -1 11)
    , (Cell 1 11)
    , (Cell 2 11)
    , (Cart (Cell -2 11) (Cell -1 11))
    , (Cart (Cell -1 11) (Cell 0 11))
    , (Cart (Cell 0 11)  (Cell 1 11))
    , (Cart (Cell 1 11)  (Cell 2 11))
    , (Cart (Cell -2 11) (Cart (Cell -1 11) (Cell 0 11)))
    , (Cart (Cell -1 11) (Cart (Cell 0 11)  (Cell 1 11)))
    , (Cart (Cell 0 11)  (Cart (Cell 1 11)  (Cell 2 11)))
    , (Cart (Cell -2 11) (Cart (Cell -1 11) (Cart (Cell 0 11) (Cell 1 11))))
    , (Cart (Cell -1 11) (Cart (Cell 0 11)  (Cart (Cell 1 11) (Cell 2 11))))
    , (Cart (Cell -2 11) (Cart (Cell -1 11) (Cart (Cell 0 11) (Cart (Cell 1 11)
(Cell 2 0)))))
    , (Rect 0 0 0 9)
    , (Cell 0 12)
    , (Cell 0 13)
    ]
