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