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  RewriteEngine On 
  RewriteBase /codeigniter 
  RewriteCond %{REQUEST_URI} ^system.* 
  RewriteRule ^(.*)$ /index.php/$1 [L] 
  RewriteCond %{REQUEST_FILENAME} !-f 
  RewriteCond %{REQUEST_FILENAME} !-d 
  RewriteCond $1 !^(index.php|images|robots.txt|css) 
  RewriteRule ^(.*)$ index.php/$1 [L] 
 
 
  ErrorDocument 404 /index.php 
 
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