User-agent: *
Disallow: /pass/

User-Agent: MJ12bot
Crawl-Delay: 20

User-agent: AhrefsBot
Crawl-Delay: 20

User-agent: SemrushBot
Crawl-Delay: 20

User-agent: Googlebot
Disallow:

User-agent: Googlebot-image
Disallow:

User-agent: PetalBot
Disallow: /

User-agent: YandexBot
Disallow: /

User-agent: YisouSpider
Disallow: / 

User-agent: SputnikBot/2.3
Disallow:/

User-agent: MegaIndex.ru/2.0
Disallow: /

User-agent: Barkrowler
Disallow: /