Use this to force non www urls to 301 redirect instantly to urls with .www
Sorry but it's a little late at night, I'll let you replace the domain names in the example below.
Code:
### BEGIN CLOUDFLARE REWRITE (domainB.com to www.domainB)
RewriteEngine on
RewriteCond %{HTTP_HOST} ^video-game-chat.com$ [NC]
RewriteCond %{SERVER_PORT} ^80$
RewriteRule ^(.*)$ http://www.video-game-chat.com/$1 [R=301,L]
### END CLOUDFLARE REWRITE ###################