B 2 b1 b 2 b1

B 2 b1 b 2 b1B 2 b1 b 2 b1B 2 b1 b 2 b1B 2 b1 b 2 b1
B 2 b1 b 2 b1B 2 b1 b 2 b1B 2 b1 b 2 b1B 2 b1 b 2 b1B 2 b1 b 2 b1B 2 b1 b 2 b1B 2 b1 b 2 b1B 2 b1 b 2 b1
B 2 b1 b 2 b1B 2 b1 b 2 b1B 2 b1 b 2 b1B 2 b1 b 2 b1B 2 b1 b 2 b1B 2 b1 b 2 b1B 2 b1 b 2 b1B 2 b1 b 2 b1B 2 b1 b 2 b1B 2 b1 b 2 b1B 2 b1 b 2 b1B 2 b1 b 2 b1
B 2 b1 b 2 b1B 2 b1 b 2 b1B 2 b1 b 2 b1B 2 b1 b 2 b1B 2 b1 b 2 b1B 2 b1 b 2 b1B 2 b1 b 2 b1B 2 b1 b 2 b1B 2 b1 b 2 b1B 2 b1 b 2 b1B 2 b1 b 2 b1B 2 b1 b 2 b1B 2 b1 b 2 b1B 2 b1 b 2 b1B 2 b1 b 2 b1B 2 b1 b 2 b1
B 2 b1 b 2 b1B 2 b1 b 2 b1B 2 b1 b 2 b1B 2 b1 b 2 b1B 2 b1 b 2 b1B 2 b1 b 2 b1B 2 b1 b 2 b1B 2 b1 b 2 b1