19
17
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11111000000011111
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01111000000011110
01111000000011110
00111100000111100
00111100000111100
00111100000111100
00011100000111000
00011110001111000
00011110001111000
00001110001110000
00001111011110000
00001111011110000
00000111011100000
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00000111111100000
00000011111000000
00000011111000000
