Изменения

*[http://en.wikipedia.org/wiki/Lexicographical_order Wikipedia {{---}} Lexicographical order]* [http://ru.wikipedia.org/wiki/%D0%9B%D0%B5%D0%BA%D1%81%D0%B8%D0%BA%D0%BE%D0%B3%D1%80%D0%B0%D1%84%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B8%D0%B9_%D0%BF%D0%BE%D1%80%D1%8F%D0%B4%D0%BE%D0%BA Википедия {{---}} Лексикографический порядок]*[http://en.wikipedia.org/wiki/Lexicographical_order Lexicographical order]