In all honesty, nobody knows for sure. Some have said they are numbered for the folks in the scientific/medical fields.
We can't tell you without first dipping you in hot body wax, removing said wax, and drenching you in The Veg. Sorry, it's the rules.
First of all the answer was 420. But putting that to bed, we can now ask if we'd be any less confused if the numbers were 5,8,2,9?