D12121212121313233313123231323223313132322331323132233132313123123111   >>    D1212121212131323331312323132322331313232233132313223313231312312311   <<    D12121212121313233313123231323223313132322331323132233132313123123113   >>      D12121212121313233313123231323223313132322331323132233132313123123112   >>