11111111111111111111
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11111110z00111111111
11111100000011111111
11111000000000011111
111110\0?????0011111
11111000@@@??0001111
11111000??@@@0\01111
11111000?????0001111
11111100000000111111
11111111100001111111
11111111111111111111

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6
5
1