D1212132333132233131323222313231323132313331322331313231323123232211   >>    D121213233313223313132322231323132313231333132233131323132312323221   <<    D1212132333132233131323222313231323132313331322331313231323123232213   >>      D1212132333132233131323222313231323132313331322331313231323123232212   >>