Thereafter, the bids forming this combination can be declared {TAIL ~ the winning bids} of the auction, reverse auction or {HEAD ~ exchange} 
Thereafter , the bids forming this combination can be declared { TAIL ~ the winning bids } of the auction , reverse auction or { HEAD ~ exchange }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD