Each of the players at his turn is given an opportunity to discard one or more of his pieces in {HEAD ~ return} for {TAIL ~ a reduction} in his supply of value markers 
for
Each of the players at his turn is given an opportunity to discard one or more of his pieces in { HEAD ~ return } for { TAIL ~ a reduction } in his supply of value markers
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH