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