disposing the body within the cavity such that the inner layer contacts {TAIL ~ the body} in {HEAD ~ a first position} 
disposing the body within the cavity such that the inner layer contacts { TAIL ~ the body } in { HEAD ~ a first position }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD