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