Rick: My ability to read tacit expressions is so poor that I overlooked the 
fact that the your quoted output did not come directly from the Key expression; 
silly me, I thought there was some form of the modifiers/arguments to Key that 
yielded the results of two inputs. 

(In contrast to your skill, it took be about a half a day to come up with the 
tacit dyad(?) mmjnn=:(; ,.) to glue together my trigram table and one result 
vector.) 

So I wonder if I dare ask again: 
                why do the sizes of the x and y argument to Key need to match?

(Thanks again for all the help!)

> On Oct 12, 2019, at 5:16 AM, Ric Sherlock <tikk...@gmail.com> wrote:
> 
>>> Or to summarise by trigram:
>>> 
>>> (~.@; trig);|: <: #/.~&> supertrig
>>> 
>>> +---+---+
>>> 
>>> |ggt|1 2|
>>> 
>>> |gta|2 0|
>>> 
>>> |taa|1 1|
>>> 
>>> |aaa|2 0|

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