{HEAD ~ The magnets} are positioned with {TAIL ~ their holes} aligned to form a common passageway 
are positioned with
{ HEAD ~ The magnets } are positioned with { TAIL ~ their holes } aligned to form a common passageway
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH