D1212132333132233131323222313231323132313331322331323331313212121   >>    D121213233313223313132322231323132313231333132233132333131321212   <<    D1212132333132233131323222313231323132313331322331323331313212123   >>      D1212132333132233131323222313231323132313331322331323331313212122   >>