D13231123313133313223313132233131323221323132313132313113313223111   >>    D1323112331313331322331313223313132322132313231313231311331322311   <<    D13231123313133313223313132233131323221323132313132313113313223113   >>      D13231123313133313223313132233131323221323132313132313113313223112   >>