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