Is that really impossible? What about combining both. Let's say you have the words INNERTAG, TEXTTAG, BLOCKTAG and ANEXTREMLYLONGTAG.
An expression like [ABIT][ELN][ENOX][CETX][RKT]++[EGLMNORY]++TAG matches all of them, and also many other strings. But perhaps no other strings are found in the larger context.
An expression like [ABIT][ELN][ENOX][CETX][RKT]++[EGLMNORY]++TAG matches all of them, and also many other strings. But perhaps no other strings are found in the larger context.