#!/usr/bin/env bash
python3 - <<'PY'
p1 = b"This is a known message!"
c1 = bytes.fromhex("a469b1c502c1cab966965e50425438e1bb1b5f9037a4c159")
c2 = bytes.fromhex("bf73bcd3509299d566c35b5d450337e1bb175f903fafc159")
p2 = bytes(a ^ b ^ c for a, b, c in zip(p1, c1, c2))
print(p2.decode())
PY
