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

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