Reported method
Players report that the note is an elimination clue rather than a direct four-digit code:
- Align the letters with the number positions.
- Find the number that sits under each X.
- Exclude those X-linked numbers.
- Read the remaining numbers in the order shown to form the suitcase code.
After opening the suitcase, a separate small box may require an item obtained from Alexandra in the bath. That one-step follow-up is noted here rather than expanded into a thin page.