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