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Learn a Fact: 2 x 0

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

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