htaccess to redirect to different domain name

In order to implement direction for different domain on htaccess, please use the following configuration.

RewriteEngine on

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{HTTP_HOST} ^www\.example\.com [NC]
RewriteRule ^aaaa/([0-9]+)\.html$ /index.php?action=A&sid=$1 [QSA,L]
RewriteCond %{HTTP_HOST} ^example\.com [NC]
RewriteRule ^bbbb/([0-9]+)\.html$ /index.php?action=B&sid=$1 [QSA,L]