O.V. Druzhinina1, I.I. Vasilyeva2, O.N. Masina3

1 FRC «Computer Science and Control» of Russian Academy of Sciences (Moscow, Russia)

1-3 Bunin Yelets State University (Yelets, Russia)

1 ovdruzh@ipiran.ru; 2 irinavsl@yandex.ru; 3 olga121@inbox.ru