array:47 [
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  "HTTP_ACCEPT" => "*/*"
  "HTTP_HOST" => "utopia.asmio.app"
  "HTTP_USER_AGENT" => "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)"
  "HTTP_ACCEPT_ENCODING" => "gzip, br, zstd, deflate"
  "HTTP_MAX_FORWARDS" => "10"
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  "HTTP_CLIENT_IP" => "3.135.64.92:64574"
  "HTTP_DISGUISED_HOST" => "utopia.asmio.app"
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  "HTTP_WAS_DEFAULT_HOSTNAME" => "utopia-prod.azurewebsites.net"
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  "HTTP_X_APPSERVICE_PROTO" => "https"
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]
New Upstream B1 Student's Book

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