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