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Creating Arbitrarily Long Lists of Numbers

          (low low+1 low+2 ... high-1 high)
Q: What list of this form is such that low > high?

A: The empty list

Q: If you have the number  low
and the list  (low+1 low+2 ... high),
how do you create  (low low+1 low+2 ... high)?

A:


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