{HEAD ~ The predetermined fashion} of operation of the status indicator can be used to identify {TAIL ~ the problem} that was detected 
used to identify
{ HEAD ~ The predetermined fashion } of operation of the status indicator can be used to identify { TAIL ~ the problem } that was detected
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH