Wow, yours is great. If I had seem it I probably wouldn't try to write my own. One problem we are facing (me, you, rosettacode.org itself) is that is difficult

Wow, yours is great. If I had seem it I probably wouldn't try to write my own. One problem we are facing (me, you, rosettacode.org itself) is that is difficult to find the examples that will help you more at any given time (but definitely my solution -- show everything randomly -- is the worse).