In {HEAD ~ addition} to {TAIL ~ the memory}, the system includes a write module and a read module, each of which is coupled to the memory 
to
In { HEAD ~ addition } to { TAIL ~ the memory } , the system includes a write module and a read module , each of which is coupled to the memory
OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH