Просвещайтесь: https://ru.wikipedia.org/wiki/%D0%92%D0%B5%D0%BD%D0%B3%D0%B5%D1%80%D1%81%D0%BA%D0%B8%D0%B5_%D0%B7%D0%B0%D0%B2%D0%BE%D0%B5%D0%B2%D0%B0%D0%BD%D0%B8%D1%8F_%D0%B2_%D0%95%D0%B2%D1%80%D0%BE%D0%BF%D0%B5https://ru.wikipedia.org/wiki/%D0%92%D0%B5%D0%BD%D0%B3%D0%B5%D1%80%D1%81%D0%BA%D0%BE%D0%B5_%D0%B7%D0%B0%D0%B2%D0%BE%D0%B5%D0%B2%D0%B0%D0%BD%D0%B8%D0%B5_%D0%9F%D0%B0%D0%BD%D0%BD%D0%BE%D0%BD%D1%81%D0%BA%D0%BE%D0%B9_%D1%80%D0%B0%D0%B2%D0%BD%D0%B8%D0%BD%D1%8B