Thus, the head of user 20 is placed into contact with {HEAD ~ the inside surface} 48 of {TAIL ~ hood} 12 
Thus , the head of user 20 is placed into contact with { HEAD ~ the inside surface } 48 of { TAIL ~ hood } 12
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL OTH