An outer portion or tab of each folded partition is secured to one of {TAIL ~ the other partitions} to prevent {HEAD ~ disassembly} of the matrix 
An outer portion or tab of each folded partition is secured to one of { TAIL ~ the other partitions } to prevent { HEAD ~ disassembly } of the matrix
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH