Learn a Fact: 2 x 2

1
1
x  5
2
1
x  8
3
2
x  0
4
0
x  6
5
1
x  6
6
0
x  1
7
1
x  1
8
4
x  0
9
2
x  1
10
1
x  3
11
9
x  0
12
5
x  0
13
2
x  2
14
0
x  7
15
1
x  7
16
2
x  2
17
1
x  9
18
0
x  8
19
1
x  4
20
3
x  0

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2

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4

2

x2


4

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