In addition to the master calendar, {TAIL ~ a user} may add secondary calendars in {HEAD ~ the present invention} 
In addition to the master calendar , { TAIL ~ a user } may add secondary calendars in { HEAD ~ the present invention }
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD