The method generally includes determining {TAIL ~ the mapping} from a predetermined mapping stored in {HEAD ~ a store} 
The method generally includes determining { TAIL ~ the mapping } from a predetermined mapping stored in { HEAD ~ a store }
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD