Learn a Fact: 1 x 7

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

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