{HEAD ~ North poles} in the first array are aligned with {TAIL ~ south poles} in the second array, and south poles in the first array are aligned with north poles in the second array 
are aligned with
{ HEAD ~ North poles } in the first array are aligned with { TAIL ~ south poles } in the second array , and south poles in the first array are aligned with north poles in the second array
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH