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