first and second side portions integral with each slotted portion at {HEAD ~ one side edge} of {TAIL ~ said slotted portions} 
first and second side portions integral with each slotted portion at { HEAD ~ one side edge } of { TAIL ~ said slotted portions }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL