Unfortunately, Gandalf was not present at one of the wizard workshops. This is why he was (temporarily) defeated by the Balrog. If he had attended the workshop he would have found out that the Balrog can be defeated by listing the LEAST SIGNIFICANT digit of a given number in EACH of the bases, 2 through 10. For example, the number 37, when written in base 2 ends with a 1 in the least significant position. It likewise ends in a 1 in base 3, 4, 6, and 9. It ends in a 2 in bases 5 and 7, ends in a 5 in base 8, and of course ends in a 7 in base 10. For any positive input parameter, return a string of the LEAST SIGNIFICANT digits in bases 2 through 10, with commas in between, but no comma at the end. Success will allow future wizards to defeat the Balrog! (Look at the test data for further examples)