B
B
K
R
K
A
B
K
R
K
!
A
R
!
A
B
!
!
K
R
B
K
K
!
B
R
R
A
!
B
K
!
B
B
R
B
K
A
!
B
A
A
R
!
R
R
A
A
!
K
K
A
!
A