c7-center

right-c4

right-c7

left-c3

left-c7

c4-center

right-c5

right-c8

left-c4

left-c8

c1-center

c5-center

right-c2

right-c5

left-c1

left-c5

c2-center

c6-center

right-c3

right-c6

left-c2

left-c6

c3-center