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

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