Given the task definition and input, reply with output. In this task, you're given a sentence and your task is to generate a simplified sentence that focuses on lexical paraphrasing from the original sentence given in the input.

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.

snake is a like in size key solid mass cipher which was a finalist in the increased encryption standard -lrb- aes -rrb- competition , fight , where it came second to rijndael.