For ads after each post, where to paste the codes?

Update 8 April 2008: Please note that this post was written before the New xml Blogger template was introduced. It can however be still applicable if you are still using the old classic Blogger template.(for New Blogger (formerly Beta), please see update at bottom of the post)If you want the AdSense ads to appear after each posts, paste the codes after the <$BlogItemBody$> as shown in the