{HEAD ~ This request} may be originated by the user, by the system operator, or by {TAIL ~ the subscriber identity module} 
originated by
{ HEAD ~ This request } may be originated by the user , by the system operator , or by { TAIL ~ the subscriber identity module }
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL