{TAIL ~ A new induction phase} begins to induce a north pole on tooth 4, and to reinforce {HEAD ~ the magnetic strength} of teeth 2 and 3 
{ TAIL ~ A new induction phase } begins to induce a north pole on tooth 4 , and to reinforce { HEAD ~ the magnetic strength } of teeth 2 and 3
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH