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