With all due respect to the classics, this answer is “29”, which is also a pretty nice number.
(Assuming I am counting right. You’ll tell me if I’m not.)
(Placemat drawing, Steak and Shake, 2/12/19. “Q: How many spirit rocks can you draw before your lunch comes? A: This many”. Pilot Better Retractable ballpoint pen, Fine black, on slick paper placemat. First version, color scan direct from original. Second version, processed to remove color for emphasis, no corrections).