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