B 1 3 b 1 6

B 1 3 b 1 6B 1 3 b 1 6B 1 3 b 1 6B 1 3 b 1 6B 1 3 b 1 6B 1 3 b 1 6
B 1 3 b 1 6B 1 3 b 1 6B 1 3 b 1 6B 1 3 b 1 6B 1 3 b 1 6B 1 3 b 1 6
B 1 3 b 1 6B 1 3 b 1 6B 1 3 b 1 6B 1 3 b 1 6B 1 3 b 1 6B 1 3 b 1 6B 1 3 b 1 6B 1 3 b 1 6B 1 3 b 1 6B 1 3 b 1 6B 1 3 b 1 6B 1 3 b 1 6B 1 3 b 1 6B 1 3 b 1 6B 1 3 b 1 6B 1 3 b 1 6B 1 3 b 1 6B 1 3 b 1 6B 1 3 b 1 6B 1 3 b 1 6B 1 3 b 1 6B 1 3 b 1 6B 1 3 b 1 6B 1 3 b 1 6B 1 3 b 1 6B 1 3 b 1 6B 1 3 b 1 6B 1 3 b 1 6B 1 3 b 1 6B 1 3 b 1 6B 1 3 b 1 6B 1 3 b 1 6B 1 3 b 1 6B 1 3 b 1 6B 1 3 b 1 6B 1 3 b 1 6