{TAIL ~ a rotating photosensitive drum} for forming a toner image on {HEAD ~ a cylindrical surface} thereof 
{ TAIL ~ a rotating photosensitive drum } for forming a toner image on { HEAD ~ a cylindrical surface } thereof
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH