{HEAD ~ A macro cell} is incorporated into {TAIL ~ an integrated circuit design} to describe a fixed arrangement of cells to be included in the IC 
is incorporated into
{ HEAD ~ A macro cell } is incorporated into { TAIL ~ an integrated circuit design } to describe a fixed arrangement of cells to be included in the IC
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH