D1212132333131313331323331313131323132333132233131133132313233313232322111   >>    D121213233313131333132333131313132313233313223313113313231323331323232211   <<    D1212132333131313331323331313131323132333132233131133132313233313232322113   >>      D1212132333131313331323331313131323132333132233131133132313233313232322112   >>