The base is deformable so as to enter {TAIL ~ the cavity} of {HEAD ~ the female die} 
The base is deformable so as to enter { TAIL ~ the cavity } of { HEAD ~ the female die }
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD