{TAIL ~ The rear pair} of wheels are coupled to {HEAD ~ the front pair} of wheels through a drive assembly 
{ TAIL ~ The rear pair } of wheels are coupled to { HEAD ~ the front pair } of wheels through a drive assembly
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH