each footed portion being defined in {HEAD ~ part} by {TAIL ~ an upper surface} which diverges from said body portion 
each footed portion being defined in { HEAD ~ part } by { TAIL ~ an upper surface } which diverges from said body portion
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH