A computer program embodied in {HEAD ~ a tangible computer} readable {TAIL ~ medium} for performing the method 20 
readable
A computer program embodied in { HEAD ~ a tangible computer } readable { TAIL ~ medium } for performing the method 20
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH