D12121212121313233313123231323223313132322331323132233131313231111   >>    D1212121212131323331312323132322331313232233132313223313131323111   <<    D12121212121313233313123231323223313132322331323132233131313231113   >>      D12121212121313233313123231323223313132322331323132233131313231112   >>