D1212111111222331322331313223313221323132313231313113313232213231221   >>    D121211111122233132233131322331322132313231323131311331323221323122   <<    D1212111111222331322331313223313221323132313231313113313232213231223   >>      D1212111111222331322331313223313221323132313231313113313232213231222   >>