{HEAD ~ The arrays} of {TAIL ~ permanent magnets} each has north and south poles distributed in both longitudinal and latitudinal directions along a plane 
of
{ HEAD ~ The arrays } of { TAIL ~ permanent magnets } each has north and south poles distributed in both longitudinal and latitudinal directions along a plane
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH