I've seen num? and chop but think I need something in the middle to turn a
character to a number.

Having said that I seem to have got close by accident...i.e. I was going to
try and bend this...but it found a single integer as it was :)

: (pick '((Ch) (and (= Ch (uppc Ch)) Ch)) (chop 'ab33Cd))
-> "3"

I'd like this to detect 33 but see that chop precludes this.

Any help much appreciated.

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