D231123132333132233131323223313231323133313132233132313132312121   >>    D23112313233313223313132322331323132313331313223313231313231212   <<    D231123132333132233131323223313231323133313132233132313132312123   >>      D231123132333132233131323223313231323133313132233132313132312122   >>