The easiest function would be a mapping from 12 input values to 12 output values. For example, see the Collatz conjecture which only defines two cases (but one

The easiest function would be a mapping from 12 input values to 12 output values. For example, see the Collatz conjecture which only defines two cases (but one could have 12): http://en.wikipedia.org/wiki/Collatz_conjecture http://en.wikipedia.org/wiki/Collatz_conjecture