mod_rewrite question

[php_guest]

I would like to send all users from

www.domainname.com/cars/post-title into post.php?category=car&url=post-title

AND

all users from

www.domainname.com/blog-title to blog.php?url=blog-title

I wrote in htaccess the following lines:

1. RewriteRule ^cars/?([-a-zA-Z_&0-9&,!]+).html$ post.php?category=car&url=$1

2. RewriteRule ^/?([-a-zA-Z_&0-9&,!]+).html$ blog.php?id=$1

 

The problem is if user type www.domainname.com/cars-some-text it sends to post.php and not blog.php because it take the first rule even if there is no "/" after "cars". Please tell me how I can write that it sends to cars/ only if there is also "/" in cars/ and not only "cars".