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Disallow: /
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Crawl-delay: 10
User-agent: baiduspider
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User-agent: Baiduspider+ 
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User-agent: Baiduspider-video
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User-agent: msnbot
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User-Agent: MJ12bot
Crawl-Delay: 20
User-Agent: SemrushBot
Crawl-Delay: 20
User-Agent: AhrefsBot
Crawl-Delay: 20 
User-agent: Riddler
Disallow: /
User-agent: BUbiNG
Disallow: /