D1212132333132233131323222313231323221323132322331313231331123121   >>    D121213233313223313132322231323132322132313232233131323133112312   <<    D1212132333132233131323222313231323221323132322331313231331123123   >>      D1212132333132233131323222313231323221323132322331313231331123122   >>