The riddle is a problem with Roman numerals. The Priestess is number II (2) as read on the book about tarots. The Eye Of The Night is XXII (22). The Fool is 0. The Moon is XVIII (18). The Hanged Man is XII (12). Look in the book of drawings to see that XVIII can stay only in the east position (the last letter is I instead of L); XII is only in the southwest position; II is only in the northwest position; 0 and XXII have two places where they can stay. Swap them until you find their correct place.