Hobbits have a very peculiar way of writing their numbers. They count in base 8, but they write their base 8 numbers in the reverse order compared to us. For example, the number 42 converts to base 8 as 52(base 8), but of course, the hobbits write this as 25. This also means that numbers like 80 which convert to 120(base 8) will be written by the hobbits as 021.

Write a method that accepts a positive integer in base 10 and returns a string representing how the hobbits would write that number.

Look at the test data for further examples.