D12121323331322331311132313132313331323221123313231312121212121   >>    D1212132333132233131113231313231333132322112331323131212121212   <<    D12121323331322331311132313132313331323221123313231312121212123   >>      D12121323331322331311132313132313331323221123313231312121212122   >>