L
B
B
A
A
C
K
L
C
A
B
B
L
A
C
A
A
A
L
B
A
K
C
B
L
A
A
C
B
K
L
K
C
A
K
K
B
C
A
A
L
C
K
C
C
A
B
B
L
C
L
K
K
A
C
L
K
L
C
C
L