We gave out opps this problem today, they got the bidding right but the play wrong.
W will bid 4♦ whatever S does
Our opps got the ♠J10 dropping from E in 6♠ so (if we were playing true cards and in fact we were) had to decide after an A♦ lead and club switch whether the opposing hands were 3442/2164 or 3244/2362 guessed wrong and went off.