9 0
o 0
p
o
m 0
n
m
k 0
l
k
i 0
j
i
g 0
h
g
4 4
e 0
f
e
3 3
c 0
d
c
2 2
a 0
b
a
1 1
x 1 2
x x
x 3
x x
x 4
X x x
0 X x X X 0 0 0
a a
a
b b
b
c c
c
d d
d
e e
e
f f
f
g g
g
h h
h
0 0 0 0 9 0 9 0
2 2
3 3
4 4
i i
i
j j
j
2 2
k k
k
l l
l
3 3
m m
m
n n
n
4 4
o o
o
p p
p