D12121323331313223313233313131313231323133313123232233132313221231   >>    D1212132333131322331323331313131323132313331312323223313231322123   <<    D12121323331313223313233313131313231323133313123232233132313221233   >>      D12121323331313223313233313131313231323133313123232233132313221232   >>