D1212132333132233131312323131323132322331323133313113313231123311   >>    D121213233313223313131232313132313232233132313331311331323112331   <<    D1212132333132233131312323131323132322331323133313113313231123313   >>      D1212132333132233131312323131323132322331323133313113313231123312   >>