Six years ago, the sum of ages of Luna, Lily, and Lucy was $33-6\times3=15$. Lucy was $15-0-5=10$ years old. 
Luna, Lily, and Lucy are talking about their ages. $6$ years ago, Luna was born, and Lily was $5$ years old. This year, the sum of ages of these $3$ people is $33$. When Luna was born, how old was Lucy? 
A. $$7$$ 
B. $$8$$ 
C. $$9$$ 
D. $$10$$ 
E. $$11$$ 