<b_jonas> echo $\'#!/usr/bin/perl\\n\'\'$_=shift;sub k{my$t;$t=~y/IVXLC/XLCDM/,$t.=("",I,II,III,IV,V,VI,VII,VIII,IX)[$_]for/./g;$$t=$_;$t}k for s""\\$"..4e3;print eval(),$/\' > bin/fromroman && chmod a+x bin/fromroman

We don't know what certainty is for sure, but at least it isn't a functor.