D1212111111222331322331313223313221323132313231313113313233313123123221   >>    D121211111122233132233131322331322132313231323131311331323331312312322   <<    D1212111111222331322331313223313221323132313231313113313233313123123223   >>      D1212111111222331322331313223313221323132313231313113313233313123123222   >>