D1313331322132333132333131311331323331323132233132313231323221221   >>    D131333132213233313233313131133132333132313223313231323132322122   <<    D1313331322132333132333131311331323331323132233132313231323221223   >>      D1313331322132333132333131311331323331323132233132313231323221222   >>