User-agent: *
Disallow:

User-agent: Yandexbot
User-agent: Baiduspider
User-agent: MJ12bot
User-agent: BLEXbot
User-agent: SEMRush
User-agent: Ahrefbot
User-agent: MegaIndex.ru/2.0
User-agent: MegaIndex.ru
User-agent: megaIndex.ru
Disallow: /