Learn a Fact: 1 x 4

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

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