The invention also relates to a program for causing {HEAD ~ a computer} to perform {TAIL ~ the three dimensional display method} 
to perform
The invention also relates to a program for causing { HEAD ~ a computer } to perform { TAIL ~ the three dimensional display method }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL