Learn a Fact: 2 x 1

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

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