8
a
b
c
d
e
f
g
h
c
500 4
a
b
d
h
f
290 3
a
b
c
a
489 7
b
c
d
e
f
h
g
g
0 0
e
1789 2
f
h
d
2000 5
a
b
h
f
e
b
192 5
a
c
h
g
d
h
0 2
a
b