Learn a Fact: 1 x 3

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

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