Comment by enoint

It’s regex based. They’re looking for 8647, or the sum, 25. 25 cents is a quarter, so anything with George Washington’s profile is suspect. And 25 cents in old time slang is two bits (a Spanish dollar was 8 bits, or a piece of 8). Some younger people abbreviated two bits into 2b, so we now have some divisive terminology, “2b or not 2b”. Short list of regexes.