20
16
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0111000000000110
0110000000000011
0110000000000011
0111000000000000
0011100000000000
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0001111111111000
0000000111111110
0000000000011110
0000000000000111
1100000000000011
1100000000000011
0110000000000011
0111000000000110
0011110000001110
0001111111111100
0000011111110000
