In article <a5k7ej$d5a$1 at animus.fel.iae.nl>, Carel Fellinger <cfelling at iae.nl> wrote: > So please explain why you think it natural to loop over a number. Maybe it's as natural as Perl's ability to concatenate numbers? -- David Eppstein UC Irvine Dept. of Information & Computer Science eppstein at ics.uci.edu http://www.ics.uci.edu/~eppstein/