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Learn a Fact: 2 x 0

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

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