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Learn a Fact: 2 x 1

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

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2

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