Left: individual distances and extinctions for OB-type stars. Red symbols show the parameters for region A stars, and blue symbols for region B stars. Mean values of distance and extinction for regions A and B stars are marked with three- and four-pointed black stars, respectively. Right: individual distances and extinctions for non-OB stars in regions A (red symbols) and B (blue symbols). Estimates for spectral type A, F, and G dwarfs are shown with triangles, and giant stars estimates are shown with squares.