Disentangled spectrum of the secondary in the wavelength region from 4230 to 4325 Å. The metallic lines seen in the observed spectrum are the O ii lines at 4253.9, 4254.1, 4276.8, 4283.0 and 4303.8 Å, N ii 4241.8 Å line and C ii 4267.1 Å line. The O ii lines in the disentangled spectrum of the secondary (black line) are weaker than suggested by the synthetic spectrum for the temperature of 25 500 K (violet/gray line).