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Text File  |  1996-06-04  |  144b  |  6 lines
  1. % This problem is from comp.lang.prolog,
  2. % wender@top.cis.syr.edu (Elaine Wenderholm)
  3.  
  4. between(I,I,_).
  5. between(L,I,H) :- L<H, between(L+1,I,H).
  6.