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1
x  7
2
1
x  5
3
8
x  1
4
0
x  1
5
3
x  0
6
1
x  1
7
1
x  9
8
0
x  5
9
1
x  6
10
0
x  4
11
7
x  0
12
1
x  3
13
0
x  9
14
0
x  6
15
1
x  4
16
2
x  0
17
2
x  1
18
8
x  0

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