{HEAD ~ Such a bus arbitration system} adopts both the daisy chain arbitration mode and {TAIL ~ the round robin arbitration mode} organically 
adopts
{ HEAD ~ Such a bus arbitration system } adopts both the daisy chain arbitration mode and { TAIL ~ the round robin arbitration mode } organically
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH