{HEAD ~ Base} 10 is connected to {TAIL ~ one part 12a} of a base joint 12 
is connected to
{ HEAD ~ Base } 10 is connected to { TAIL ~ one part 12a } of a base joint 12
HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH