Here's the shortest sequence I've found, for four letter combinations of 'abcde':
abceadceabdecbadebcaedcbaecdbacdeabcdaecbdaebdcebdacebadcbedca becadecabdcaebcdebacedbaedbcadbeadbcedabedacbdeacbeacdbecdabc That should be 123 characters, once it's "unwrapped". I used the code I posted earlier but using ? instead of ?. and ran it several times. Slightly over 1% of my results have length 123. -- Raul ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
