{HEAD ~ Substantial portions} of the method of the invention are typically implemented on a computer system running {TAIL ~ a computer program product} 
{ HEAD ~ Substantial portions } of the method of the invention are typically implemented on a computer system running { TAIL ~ a computer program product }
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL