Learn a Fact: 1 x 7

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

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