D1313331322132333132333131311331323331323132233132313232211233132333121   >>    D131333132213233313233313131133132333132313223313231323221123313233312   <<    D1313331322132333132333131311331323331323132233132313232211233132333123   >>      D1313331322132333132333131311331323331323132233132313232211233132333122   >>