TL;DR: Detect periodicity of broken PRNG

[https://github.com/fab1ano/tasteless-ctf-20/tree/master/babychaos](https://github.com/fab1ano/tasteless-ctf-20/tree/master/babychaos)

Original writeup (https://github.com/fab1ano/tasteless-ctf-20/tree/master/babychaos).