deletions | additions       diff --git a/abstract.tex b/abstract.tex  index 7eee177..4290799 100644  --- a/abstract.tex  +++ b/abstract.tex 
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Use single (10 point) spacing.   The abstract is a very brief summary highlighting main accomplishments, what is new, and how it relates to the state-of-the-art.  \emph{Key Words}: List no more than five key words CAD, MCNP, Geant4, Fluka, Monte Carlo