The female die has a cavity, {HEAD ~ whose wall} has {TAIL ~ a bottom portion} and a top portion 
The female die has a cavity , { HEAD ~ whose wall } has { TAIL ~ a bottom portion } and a top portion
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH