A number of unique combinations of bids can be formed from the received bids, and {HEAD ~ the one combination} of bids which represents {TAIL ~ the best value} in terms of an auction setting, a reverse auction setting and an exchange setting can be determined 
A number of unique combinations of bids can be formed from the received bids , and { HEAD ~ the one combination } of bids which represents { TAIL ~ the best value } in terms of an auction setting , a reverse auction setting and an exchange setting can be determined
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH