{HEAD ~ Each} of {TAIL ~ the side surfaces} has an inset spanning from the block top surface to the block bottom surface 
of
{ HEAD ~ Each } of { TAIL ~ the side surfaces } has an inset spanning from the block top surface to the block bottom surface
HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH