You will need the 2, 3, 10, 9, and 8 of hearts in that order. This is because 8 days before Halloween, 1998 is 23/10/98 according to the Ace of Hearts. Arrange the cards with the 2 and 3 together, then the 10, then the 9 and 8 together. Combine the symbols within the heart pips (similar to the example in the Ace of Clubs) to form letters and get your 3-letter word.