Each first slot 26 has an introductory triangular cutout 28 proximate the first edge 18 of {HEAD ~ the partition} 14 and {TAIL ~ a hook} 30 located in the triangular cutout 28 as shown in FIG 2 
Each first slot 26 has an introductory triangular cutout 28 proximate the first edge 18 of { HEAD ~ the partition } 14 and { TAIL ~ a hook } 30 located in the triangular cutout 28 as shown in FIG 2
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH