Forgive my pseudocode (based on Neil's example):

function A: search ":" = [0],  scope (before [0]),  count [a-z] = [1],
format [1] [TWO-DIGIT ZERO-PADDED  HEXADECIMAL NUMBER]  /* :-P */,
format [1] [lowercase], move [1] [0].

Breakdown:
function A:
 search ":" = [0],                  // search for ":" and set it to
the 0 parameter
 scope (before [0]),            // set the scope for the next
operation as before 0 (":")
 count [a-z] = [1],               // count anything a-z within the
scope and set it to another parameter 1
 format [1] [TWO-DIGIT ZERO-PADDED HEXADECIMAL NUMBER],
 format [1] [lowercase],  // shouldn't affect numbers, and hex = A-F
anyway, so "A-F distinction = unnecessary
 move [1] [0].                 // put the results of 1 in the 0
position, period (.) ambiguously =  stop symbol

I'm not sure this gets all of it. IANAP

Me: "Compromising between efficiently terse syntax and efficiently expressive
natural language gets... "  .. a functional language?   Haskell?

-Steven

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