Challenge archive: zh3r0 CTF V2 2021 - twist_and_shout

Challenge: twist_and_shout
Event: zh3r0 CTF - 2021 (V2)
Year: 2021
Category: Cryptography
Authors: deuterium
Mode: offline
Article: https://deut-erium.github.io/challenges/zh3r0-2021/twist-and-shout/
Text: https://deut-erium.github.io/challenges/zh3r0-2021/twist-and-shout/challenge.txt
JSON: https://deut-erium.github.io/challenges/zh3r0-2021/twist-and-shout/challenge.json

Original description:
Wise men once said, "Well, shake it up, baby, now Twist and shout come on and work it on out" I obliged, now the flag is as twisted as my sense of humour

Notes:
- Use all 624 lines in output.txt with the original source. The Untwist Me practice variant has its own output and flag.
- This fixed output was generated for the post with the unchanged original program and event flag. It is not a recording from the competition.
- This is a static archive. No live challenge service or runtime simulation is provided here.

Challenge files (primary):
- challenge.py (challenge.py; handout)
  URL: https://deut-erium.github.io/assets/challenges/zh3r0-2021-twist-and-shout/challenge.py
  Bytes: 429
  SHA-256: 8224a8aa462a4f618aeaa0184ad59aad07a748e453753b6dcefba5664fd9debf
  Upstream provenance: https://raw.githubusercontent.com/zh3r0/zh3r0-ctf/7fd08591b088215d58aefdc3b0f64c4a9de80f5d/V2/crypto/twist_and_shout/public/challenge.py
- Fixed instance (output.txt) (output.txt; fixed-instance)
  URL: https://deut-erium.github.io/assets/challenges/zh3r0-2021-twist-and-shout/output.txt
  Bytes: 6700
  SHA-256: 898a7067d8e4fcf757ea59050015390d643fe39305f63fd1799e4072a41cf529

Licenses (local copies):
No local license record is available for this entry.

SPOILERS - organizer files and solutions
Spoilers: organizer files and upstream source, archive, or solution links may reveal answers. Modified downloads are identified below.
Source: https://github.com/zh3r0/zh3r0-ctf/blob/7fd08591b088215d58aefdc3b0f64c4a9de80f5d/V2/crypto/twist_and_shout/readme.md#L6
Archive: https://github.com/zh3r0/zh3r0-ctf/tree/7fd08591b088215d58aefdc3b0f64c4a9de80f5d/V2/crypto/twist_and_shout
Solution: https://github.com/zh3r0/zh3r0-ctf/blob/7fd08591b088215d58aefdc3b0f64c4a9de80f5d/V2/crypto/twist_and_shout/admin/solve.py