code for determining {TAIL ~ a first set} of candidates from the plurality of {HEAD ~ candidates} who have completed online certification 
code for determining { TAIL ~ a first set } of candidates from the plurality of { HEAD ~ candidates } who have completed online certification
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH