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