0
1
10
11
100
101
110
111
1000
1001
1010
1011
1100
1101
1110
1111
10000
10001
10010
10011
10100
10101
10110
10111
11000
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11100
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100000
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101000
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110000
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1000000
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10000000
10000001
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10001000
10001001
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10001100
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10101001
