20
19
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0000011110111100000
0000111110111100000
0000111100011110000
0000111100011110000
0001111100011110000
0001111000001111000
0001111000001111000
0011111111111111000
0011111111111111100
0011111111111111100
0111110000000111100
0111100000000011110
0111100000000011110
1111100000000011110
1111000000000001111
