| 1, 2, 11, 12, 21, 101, 1001, 1002, 1011, 10001, 10002, 10011, 10012, 10021, 10101, 11001, 11002, 100001, 100002, 100011, 100012, 100021, 100101, 101001, 101002, 101011, 110001, 110002, 110011, 110012, 110021, 110101, 111001, 111002, 200001
(list; graph; listen)
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