foo

foo, bar, baz, boo, booo, boooo [...]
foo, bar, baz, quux, quuux, quuuux [...]
foo, bar, thud, grunt
foo, bar, fum
foo, bar, baz, bongo
foo, bar, zot
toto, titi, tata, tutu
pippo, pluto, paperino
oogle, foogle, boogle; zork, gork, bork
blah, fasel, blub

verschiedene Varianten metasyntaktischer Variablen