{HEAD ~ The back wall} 39 is between the side walls and is generally at right angles to each of {TAIL ~ the side walls} 47, 38 
{ HEAD ~ The back wall } 39 is between the side walls and is generally at right angles to each of { TAIL ~ the side walls } 47 , 38
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH