C111123313121111121111331333133313231323132322331323223313232211312121   >>    C11112331312111112111133133313331323132313232233132322331323221131212   <<    C111123313121111121111331333133313231323132322331323223313232211312123   >>      C111123313121111121111331333133313231323132322331323223313232211312122   >>