All Vulnerable		North 8♠		Contract : 6♣
Declarer (W) ♠  K ♥  K ♦  A Q 10 7 ♣  A K Q J 9 7 4	10♦		w A♠ <	Dummy (E) ♠  A 10 7 4 2 ♥  Q 5 ♦  J 8 6 4 ♣  10 3
		5♠ South
Dummy leads his A♠, discarding another diamond in Declarer's hand. What does Dummy lead next ?