means for making one of {HEAD ~ an input request} to {TAIL ~ a user} and for executing the computer program, wherein 
to
means for making one of { HEAD ~ an input request } to { TAIL ~ a user } and for executing the computer program , wherein
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH