B 1 c2

B 1 c2B 1 c2B 1 c2B 1 c2B 1 c2B 1 c2
B 1 c2B 1 c2B 1 c2B 1 c2B 1 c2B 1 c2
B 1 c2B 1 c2B 1 c2B 1 c2B 1 c2B 1 c2B 1 c2B 1 c2B 1 c2B 1 c2B 1 c2B 1 c2B 1 c2B 1 c2B 1 c2B 1 c2B 1 c2B 1 c2B 1 c2B 1 c2B 1 c2B 1 c2B 1 c2B 1 c2B 1 c2B 1 c2B 1 c2B 1 c2B 1 c2B 1 c2B 1 c2B 1 c2B 1 c2B 1 c2B 1 c2B 1 c2