{TAIL ~ The “first leg}” corresponds to {HEAD ~ one leg} of the biped walking robot and the “second leg” corresponds to the other leg thereof 
{ TAIL ~ The “ first leg } ” corresponds to { HEAD ~ one leg } of the biped walking robot and the “ second leg ” corresponds to the other leg thereof
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH