D12121323331322331313232223132322331323331323222313231323221231   >>    D1212132333132233131323222313232233132333132322231323132322123   <<    D12121323331322331313232223132322331323331323222313231323221233   >>      D12121323331322331313232223132322331323331323222313231323221232   >>