[rlkmmadz] 4^4 cards

Create a deck of 256 cards spanning all possibilities of 4 symbols with 4 possibilities each.

Cards are rectangular shaped, offering elegant possibilities of illustrating by dividing the face of a card into quarters. (However, keep a summary of the card's identity in the corner, as with traditional playing cards.)  There are likely elegant games possible with this deck.

The next smallest deck is 3^3 = 27.  Perhaps two of each card yielding 54.