B spb

B spbB spbB spbB spb
B spbB spbB spbB spbB spbB spbB spbB spb
B spbB spbB spbB spbB spbB spbB spbB spbB spbB spbB spbB spb
B spbB spbB spbB spbB spbB spbB spbB spbB spbB spbB spbB spbB spbB spbB spbB spb
B spbB spbB spbB spbB spbB spbB spbB spb