Luck

Lili: Today is Friday the 13th?
Me: Yes
Lili: 13...that is number which is not lucky
Me: Yup
Lili: But it is July
Me: Ok?
Lili: July is 7. 7 is lucky number!
Me: Right
Lili: So what does that mean?
Me: Um?
Lili: You have the lucky and the unlucky?
Me: You know Lili, that's a really good question!