These mechanisms may include a set of one or more pattern matching masks and {HEAD ~ a count indication} into {TAIL ~ the packet} as to where pattern matching will begin 
into
These mechanisms may include a set of one or more pattern matching masks and { HEAD ~ a count indication } into { TAIL ~ the packet } as to where pattern matching will begin
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH