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