Re: Expert QOTW #14 more results

Mark Jason Dominus <mjd-ZxR0713JXSrQT0dZR+AlfA@xxxxxxxxxxxxxxxx>:
> While I was devising my own test data for the postmortem report, I
> started puzzling over methods for generating strings with no repeated
> substrings.  Nothing came immediately to mind, although I had a
> nagging feeling that there was an easy way to do it...
> 
> Oho, I know how to do it.  You just generate a De Bruijn sequence.
> Maybe we will do that in a future quiz.

I wrote code for this to generate a test case for last week's quiz.
If anyone is interested, it is at

        http://perl.plover.com/qotw/misc/e014/dbs.pl

I suppose this pre-empts the future quiz, but that's the way it goes.