D121213233313221323133313221323132333132313112211231211331322321   >>    D12121323331322132313331322132313233313231311221123121133132232   <<    D121213233313221323133313221323132333132313112211231211331322323   >>      D121213233313221323133313221323132333132313112211231211331322322   >>