D231123313223313132313232233131331123231323223313123231333132211231   >>    D23112331322331313231323223313133112323132322331312323133313221123   <<    D231123313223313132313232233131331123231323223313123231333132211233   >>      D231123313223313132313232233131331123231323223313123231333132211232   >>