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