{HEAD ~ The enclosure} includes {TAIL ~ a bottom wall} and a side wall extending from the bottom wall 
{ HEAD ~ The enclosure } includes { TAIL ~ a bottom wall } and a side wall extending from the bottom wall
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH