B
B
S
B
B
B
B
M
M
P
P
P
P
S
S
P
P
M
M
P
P
B
B
S
S
M
M
P
P
M
M
S
S
S
S
P
S
S
M
M
S
B
B
S
S
S
S
M
M
S
S
S
B
B
S
S