Still referring to FIG 1, block 15 depicts {TAIL ~ the first step} in {HEAD ~ the practice} of this invention 
Still referring to FIG 1 , block 15 depicts { TAIL ~ the first step } in { HEAD ~ the practice } of this invention
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH