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