A plurality of {HEAD ~ rectangular notches} 32 extend inwardly from {TAIL ~ the second edge} 20 of the partition 14 
extend inwardly from
A plurality of { HEAD ~ rectangular notches } 32 extend inwardly from { TAIL ~ the second edge } 20 of the partition 14
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH