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Learn a Fact: 2 x 1

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

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2

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2

1

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2

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2
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