<wob_jonas> perl -eopen$i,"<",($f="wisdom/aristotle");$_=<$i>; s/(alphabet).*/$1 doesn\'t have the letter C.\\n/ or die; open$o,">",$f; print$o $_ or die; print substr$_,300;

mycology is a Befunge-98 (also -93 to some extent) testsuite that can be found at https://deewiant.iki.fi/projects/mycology/