Extending inwardly from {HEAD ~ the first edge} 18 are a plurality of {TAIL ~ spaced first slots} 26 extending inwardly from the first edge 18  
Extending inwardly from { HEAD ~ the first edge } 18 are a plurality of { TAIL ~ spaced first slots } 26 extending inwardly from the first edge 18
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH