s/^/cow=\ sheep=-baa\ duck=\ pig=-oink/ s/$/-quack-baa/3mg s/.*/@%&-moo@/mg s/-\w*/A && !, and_&& t!.\ Here_&, t!_&, everyw!_&&.\n/g : s/ -/ / s/=A/#With a/ s/a o/an o/ s/@/Old MacDonald had_farm#/ s/%/And on his farm he had_/ s/#/, E-I-E-I-O.\n/ s/!/here/ s/_/ a / t
Note that non-ascii characters in the above source code will be escaped (such as \x9f).