{HEAD ~ A group} of rods having the desired fuel enrichment and {TAIL ~ additive types} is placed on a first queuing table 
{ HEAD ~ A group } of rods having the desired fuel enrichment and { TAIL ~ additive types } is placed on a first queuing table
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH