{TAIL ~ The assembly} comprises a plurality of first slotted partitions intersecting with {HEAD ~ a plurality} of second slotted partitions to form a collapsible matrix 
{ TAIL ~ The assembly } comprises a plurality of first slotted partitions intersecting with { HEAD ~ a plurality } of second slotted partitions to form a collapsible matrix
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH