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Disallow: /cost.htm
Disallow: /about.htm
Disallow: /service.htm
Allow: /
Allow: /?page=index
Allow: /?page=cost
Allow: /?page=service
Allow: /?page=contact
Allow: /?page=about
Allow: /?page=blog
Allow: /?page=before_after_3
Allow: /?page=before_after_1
Allow: /?page=before_after_2