X 1 c
a 2 c
a 3 Y
X 4 Y
a 5 Y
X
6
c
a
7
c
a
8
Y
X
9
Y
a
A
Y
a
1 2
B
A
a 1 2 c
B
A
a 1 a 2 ca 3 c
B
A
a 1 c a 2 c
B
X
a 1 c a 2 c
B
1a 2 c
a 1 c2
A
b
c
A
b
c
b c
d
a
b
One
Two
One
Two
One
Two
One
Two
One
Two
Three
V