D2311231323331322331313232233132333132312111133132313231331123211111   >>    D231123132333132233131323223313233313231211113313231323133112321111   <<    D2311231323331322331313232233132333132312111133132313231331123211113   >>      D2311231323331322331313232233132333132312111133132313231331123211112   >>