<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;

composition is where you take morphisms such as Phantom and Hoover from the Pha category and combine them together: Hoover ∘ Phantom.