D12121323331313223313233313131313231323223313232211221123233331   >>    D1212132333131322331323331313131323132322331323221122112323333   <<    D12121323331313223313233313131313231323223313232211221123233333   >>      D12121323331313223313233313131313231323223313232211221123233332   >>