Sunday Puzzle (NPR)On-air challengeThe theme of today’s puzzle is A.I. Fearsome sharkLast week’s challengeLast week’s challenge comes from Eric Chaikin, of Westlake Village, Calif.“I turned on the TV and saw anger, evil, slander, and ruin. The words anger, evil, slander, and ruin can be found in the middle of Rangers, Devils, Islanders, and Bruins — all N.H.L. This week’s challengeThis week’s challenge comes from Peter Gwinn, who writes for “Wait Wait … Don’t Tell Me!” Name something many hospitals have, in 7 letters. Listeners whose answers are selected win a chance to play the on-air puzzle.