D11233131212331323221323133313112211231212132313232213232212111   >>    D1123313121233132322132313331311221123121213231323221323221211   <<    D11233131212331323221323133313112211231212132313232213232212113   >>      D11233131212331323221323133313112211231212132313232213232212112   >>