Math pop-answer: trade / trade-back

The Math pop-quiz to trade $KUJI then trade back to $KUJI was a trick question.

@TeamKujira provides the ratios for all the order books, and I compute the inverse ratio to 'trade back' in those order books, as well.

So a single step 100 $KUJI -> x -> $KUJI

where x ∈ { $ATOM, $USK, $axlUSDC }

... will get you 100 $KUJI back.