Learn a Fact: 2 x 0

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

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