28-board KO.
At the table East doubled 4H(!) letting South show his HA and North cue spades, but that didn't change the rest of the auction.
By agreement you don't have a keycard ask available here (4N would be signoff; you play minorwood when the minor had been agreed previously and kickback when it's agreed at the 4-level, but nothing when it's first bid at the 4-level).
That was already +9 imps, but another 5 were available.