D1313331322132333132333131311331323133313231123313223313232211231   >>    D131333132213233313233313131133132313331323112331322331323221123   <<    D1313331322132333132333131311331323133313231123313223313232211233   >>      D1313331322132333132333131311331323133313231123313223313232211232   >>