B
O
X
S
S
B
S
B
X
S
O
X
O
L
O
X
X
B
L
L
L
L
X
O
B
O
S
L
S
L
O
X
O
S
X
L
L
B
X
B
B
O
X
S
B
B
O
L
L
S
B
S
X
S