This is the full layout. West has 13 penalty cards which must be played as directed by declarer. Clearly 6NT by East-West can only make on a spade lead and the layout is unique. West is forced to lead the king of spades and declarer wins and cashes four more spades, forcing West to discard clubs, and discarding the blocking jack of clubs reaching this 8-card ending:
Now North leads the two of spades and East is squeezed for the first time. If he discards a scarlet suit, South discards from the other suit and directs West to discard from the same suit as East. Now the top clubs force West to discard from the same suit, and South makes the last four tricks.
If East discards a club, North cashes five rounds of clubs and East is squeezed for a second time. Declarer makes two tricks in the scarlet suit which East unguards, with West being forced to unguard that suit.