Based on the customers choices, the salesperson is able to build {TAIL ~ a portfolio} of {HEAD ~ possibilities} 
Based on the customers choices , the salesperson is able to build { TAIL ~ a portfolio } of { HEAD ~ possibilities }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD