What type of pill is white and oblong with the lettering L434?

After searching for this on the internet, I found that it is Acetaminophen (generic name for Tylenol) 500 mg(extra strength). Once I found this out, I was able to go to the medicine cabinet and pull my Kroger brand 'Extra Strength Tylenol equivalent' and verify that those pills were the same oblong L484 pills as the one that I had found.