N <br /> CO <br /> 0 <br /> 0 <br /> 0 <br /> 0 <br /> 0 <br /> N <br /> 0 <br /> 0 <br /> 0 <br /> 0 <br /> O <br /> O <br /> 0 <br /> 0 <br /> 0 <br /> I0 <br /> 0 <br /> ai <br /> 0 0 <br /> U <br /> a, <br /> cn <br /> ai <br /> 0 <br /> 0 <br /> 0 <br />