D12121212121313233313123231323223313132322331323231323123123231   >>    D1212121212131323331312323132322331313232233132323132312312323   <<    D12121212121313233313123231323223313132322331323231323123123233   >>      D12121212121313233313123231323223313132322331323231323123123232   >>