1 test pattern #0000
2 test pattern #1111
3 test pattern #1110
4 test pattern #1100
5 test pattern #1011
6 test pattern #1101
7 test pattern #0001
8 test pattern #0010
9 test pattern #0011
10 test pattern #0100
11 test pattern #0101
12 test pattern #0110
13 test pattern #0111
14 test pattern #1000
15 test pattern #1001
16 test pattern #1010
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