19
17
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00001111111111000
00011111111111100
00111111111111110
01111110000111110
01111000000011111
11111000000001100
11110000000000000
11110000000000000
11110000000000000
11110000000000000
11110000000000000
11111000000001100
01111000000011111
01111100000111110
00111111111111110
00111111111111100
00001111111111000
00000011111100000
