how do I make a table of paired strings in J?
In APL I just do `'chsd'∘.,'A23456'` and it works, but the (what I thought was) equivalent J code `'chsd' ,/ 'A23456'` doesn't work. The NuVoc says it's due to the rank not being 0, however, setting the rank to 0 by doing `,"0/` produces a 4 6 2 matrix, rather than the expected 4 6 matrix