tac and rev — cat's antagonists

tac and rev — cat's antagonists

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nuclearegg69@zenbook-f13:~$ cat alphabet.txt
apple
banana
carrot
donkey
nuclearegg69@zenbook-f13:~$ tac alphabet.txt
donkey
carrot
banana
apple
nuclearegg69@zenbook-f13:~$ rev alphabet.txt
elppa
ananab
torrac
yeknod