B 2 4 a c

B 2 4 a cB 2 4 a cB 2 4 a cB 2 4 a cB 2 4 a cB 2 4 a c
B 2 4 a cB 2 4 a cB 2 4 a cB 2 4 a cB 2 4 a cB 2 4 a c
B 2 4 a cB 2 4 a cB 2 4 a cB 2 4 a cB 2 4 a cB 2 4 a cB 2 4 a cB 2 4 a cB 2 4 a cB 2 4 a cB 2 4 a cB 2 4 a cB 2 4 a cB 2 4 a cB 2 4 a cB 2 4 a cB 2 4 a cB 2 4 a cB 2 4 a cB 2 4 a cB 2 4 a cB 2 4 a cB 2 4 a cB 2 4 a cB 2 4 a cB 2 4 a cB 2 4 a cB 2 4 a cB 2 4 a cB 2 4 a cB 2 4 a cB 2 4 a cB 2 4 a cB 2 4 a cB 2 4 a cB 2 4 a c