A simple pyjail! Here, we're given a program that reads in a string and prints
it back out, but utilizes a few evals to very insecurely process the input.
The design around this jail was inspired by SQL injection attacks: being able to
break out of the quotes by adding in escaped quotes (\x22) to add in arbitrary
code execution. One possible solution is:
"\x22,__import__('os').system('/bin/bash'),\x22"