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

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