Similarly, {TAIL ~ a memory access} refers to {HEAD ~ either a memory read} or a memory write operation 
Similarly , { TAIL ~ a memory access } refers to { HEAD ~ either a memory read } or a memory write operation
OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH