Even simpler

    c2=: ' ' -.~ ":
   c2 0 0 2 3 0 4
002304

Cheers, bob

> On Sep 24, 2016, at 8:48 AM, robert therriault <[email protected]> wrote:
> 
>   c1=.": #~ ' ' ~: ":
>   c1 0 0 2 3 0 4
> 002304

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