{HEAD ~ The bottom} of the tub has {TAIL ~ first and second portions} vertically offset from one another with a connecting bridging member forming a seat 
{ HEAD ~ The bottom } of the tub has { TAIL ~ first and second portions } vertically offset from one another with a connecting bridging member forming a seat
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH