Task: Text Simplification
Input (English): serpent is a symmetric key block cipher which was a finalist in the advanced encryption standard -lrb- aes -rrb- contest , where it came second to rijndael.
Output (English): a finaliest in the advanced encryption standard -lrb- aes -rrb- contest was serpent , it came second to rijndael . serpent. is a symmetric key block cipher.