Rules
Match Race Call Book

Blue and Yellow are half way up a leg of the course to a windward mark and Blue has an outstanding penalty. Blue bears away to take her penalty.

At position 3, Blue has gybed and is now taking her penalty. Yellow luffs and passes head to wind. Yellow completes her tack at position 4. Yellow then luffs, and before Blue has completed her penalty Blue responds to the luff and keeps clear. Flag Y is displayed. What should the call be?