[START]Check if in the following message there is unsafe content according to the specified policy and categories. Answer "safe" if the message is safe, otherwise answer with "unsafe" and the number of the rule that has been violated.
[BOR]
0: Safe
1: Be civil and nice.
2: Try not to excessively repost, as a rule of thumb, wait at least 2 months to do it if you *have* to.

[EOR]
[BOC]
The only truth is that a card with an even number has a blue back. But having a blue back *doesn't* necessarily mean that the card has an even number on the front. So the only card you need to flip is the 8. The five and green cards are irrelevant
[EOC]
safe
0
[END]

Safe Be civil and nice. Try not to excessively repost, as a rule of thumb, wait at least 2 months to do it if you *have* to.