S{cyrillic}ye{cyrillic}m{cyrillic}ye{cyrillic}i{cyrillic, short}s{cyrillic}t{cyrillic}v{cyrillic}a{cyrillic}, k{cyrillic}a{cyrillic}k{cyrillic} r{cyrillic}a{cyrillic}d{cyrillic}i{cyrillic}a{cyrillic}l{cyrillic}{cyrillic small soft sign}n{cyrillic}y{cyrillic}ye{cyrillic} v{cyrillic}o{cyrillic}z{cyrillic}b{cyrillic}u{cyrillic}zh{cyrillic}d{cyrillic}ye{cyrillic}n{cyrillic}i{cyrillic}ya{cyrillic}

It is shown that the qualitative features of the experimental data on the mass spectrum and spatial extension of the charged leptons and quarks can be reproduced by the eigenstates of relativistic wave equations if there are strongly attractive renormalizable forces which are asymptotically free (or undercritical). Beyond one has to assume that the boundary condition on the running coupling is different for different bound states.