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Disallow: 
User-agent: AhrefsBot
Disallow: 
User-agent: MJ12bot
Disallow: 
User-agent: BLEXBot
Disallow: 
User-agent: DotBot
Disallow: 
User-agent: SemrushBot
Disallow: 
User-agent: YandexBot
Disallow: 
User-agent: *
Allow: /