{HEAD ~ The two sets} of {TAIL ~ two coils} are positioned on two different sides of the array 
of
{ HEAD ~ The two sets } of { TAIL ~ two coils } are positioned on two different sides of the array
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH