{HEAD ~ The slots} are sized and spaced to receive {TAIL ~ the blades} to thereby connect the components 
are sized to receive
{ HEAD ~ The slots } are sized and spaced to receive { TAIL ~ the blades } to thereby connect the components
HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH