D12121212121313233313123231323223313132322331323132233132333132313212112321   >>    D1212121212131323331312323132322331313232233132313223313233313231321211232   <<    D12121212121313233313123231323223313132322331323132233132333132313212112323   >>      D12121212121313233313123231323223313132322331323132233132333132313212112322   >>