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2:29 AM
CMC: Copy the first 2 items on the stack. That is go from ... b a -> ... b a b a
 
 
16 hours later…
6:17 PM
 
6:47 PM
@Nitrodon Nice! I had this 28 byte solution but I prefer yours.
 
@CatWizard Oh, I was misunderstanding the task
You notate backwards from me
 
Oh I see.
 

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