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User-agent: searchpreview
Disallow:/ 
User-agent: Slurp
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User-agent: Mediapartners-Google
Disallow:/

User-agent: *
Disallow: /admin.php
Disallow: /admin/
Disallow: /images/
Disallow: /includes/
Disallow: /themes/
Disallow: /blocks/
Disallow: /modules/
Disallow: /language/