1 2 3 4 5 6 7 8

E E E E E E E E

* t X X - - X X

  * X X - t X X

    * t X X t -

      * X X - -

        * t X X

          * X X

            * t

              *

handedness 1 2 3 R

handedness 2 3 4 R

handedness 3 4 6 L

handedness 3 5 6 L

handedness 5 6 7 R

handedness 6 7 8 R

handedness 6 7 1 R

handedness 7 1 2 L

handedness 8 2 3 R

sheetS 1 2 5 6

sheetS 3 4 7 8

sheetD 1 4

sheetD 5 8