Example

File foo

apple

banana

eggplant

File bar

apple

banana

banana

zucchini

comm foo bar

apple

banana

banana

eggplant

zucchini

This shows that both files accept one banana, but alone bar has a additional banana.

In added detail, the achievement book has the actualization that follows. Note that the cavalcade is interpreted by the cardinal of arch tab characters. \t represents a tab appearance and \n represents a newline (C accent notation). The spaces apparent are not allotment of the achievement file.

\t \t a p p l e \n

\t \t b a n a n a \n

\t b a n a n a \n

e g g p l a n t \n

\t z u c c h i n i \n