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Learn a Fact: 1 x 3

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1

x3


3

3

x1


3

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