A
R
R
R
A
L
R
2
U
R
R
A
R
R
A
2
R
A
R
R
L
R
A
L
L
A
R
2
A
2
L
U
R
A
L
U
U
R
A
A
2
L
2
A
2
R
A
R
R
L
A
R
U
L
U
2
U
L
R
R
U
R
U
U
L
L
R
2
L
R
L
A