Maybe we should start a thread with the various codes that CBP writes on teh blue forms and what they mean. I travel alone and they usually write "ONE." Occasional the numeral "1" but usually it's written out.

Last time I got an "A" which I guess means "agriculture" because upon exit I was directed to put my bag on the x-ray screener.

It's kind of a weird system because if I had a checked bag full of prohibited plants or fruits I could have just looked at the "A" that was written on my form and then decided to just leave that checked bag on the luggage carousel or tossed the fruit in the restroom or something. Maybe they don't have restrooms in the international baggage claim areas. I don't know.