A fourchette secures {HEAD ~ portions} of {TAIL ~ the perimeter} of the anterior and posterior portions to one another 
of
A fourchette secures { HEAD ~ portions } of { TAIL ~ the perimeter } of the anterior and posterior portions to one another
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH