{HEAD ~ The number} of levels of logic required to generate {TAIL ~ the mask} may be reduced, which may provide for mask generation at higher clock frequencies than previously possible 
{ HEAD ~ The number } of levels of logic required to generate { TAIL ~ the mask } may be reduced , which may provide for mask generation at higher clock frequencies than previously possible
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH