Take as input an integer in any reasonable format. Then, output all the proper sub-strings of the base-10 digits of that integer that are powers of two, in any reasonable format. Test cases 10230 -> [1, 2] 13248 -> [32, 1, 2, 4, 8] 333 -> [] 331 -> [1] 32 -> [2] # As 32 is not a proper sub-string...
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