Each of the first slotted partitions has opposed slots extending inwardly from {HEAD ~ opposed edges} of {TAIL ~ the partition} to facilitate folding the partition 
of
Each of the first slotted partitions has opposed slots extending inwardly from { HEAD ~ opposed edges } of { TAIL ~ the partition } to facilitate folding the partition
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH