<B> <A> <MARK
<B>  
...
usually just the implicit name of a LOCALS| or LVALUE - that is after compilation of a word containing local variables, the names of the variables are lost. Using SEE to decompile the word, the generic names <A> <B> ... <N> are chosen to name the variable spaces implicitly.

reference: _local_B_ in doc-pfe.cdoc:0018, export never <B>