D1212132333131322331323331313131323132322331313132333132313123232321   >>    D121213233313132233132333131313132313232233131313233313231312323232   <<    D1212132333131322331323331313131323132322331313132333132313123232323   >>      D1212132333131322331323331313131323132322331313132333132313123232322   >>