All Vulnerable		North
West ♠  K ♥  K ♦  A Q 10 7 ♣  A K Q J 9 7 4				East ♠  A 10 7 4 2 ♥  Q 5 ♦  J 8 6 4 ♣  10 3
		South
W N E S ?
What does West bid ?