Pascal wrote: > 0 0 1 1 1 (2 <\ ])\. i.5 Then: > sorry, key is /. not \. Yep! But to address this: > Something else happens. (called 5 times, in pattern that is hard to understand). The tally of 0 0 1 1 1 (i.e. # 0 0 1 1 1) is 5, and the dyad f\. has a left rank of 0, so (2 <\ ]) is invoked once for each of 0, 0, 1, 1, 1 . -Dan