<wob_jonas> perl -eopen$i,"<",($f="wisdom/aristotle");$_=<$i>; s/(fifth) kind of vitreous/$1/ or die; if (1) { open$o,">",$f; print$o $_ or die; } print substr$_,200;

Zed is the 26th letter of the alphabet in Commonwealth English. Why they consider what is clearly a 3-letter string to be a single letter is unclear.