D7AHA-63GV5-E0KLN

AAAAA = D7AHA
- XOR the ASCII characters

BBBBB = 63GV5
- Wrote code to attempt all possible solutions (incl. negatives)
- Restrained by logical numbers that made T(50) too high or negative

CCCCC = E0KLN
- Solve the puzzle
- Remove the black border around the edge
- Scan the QR code