Their difference: $$6+6=12$$  Billy: $$17-12=5$$ 
If Paul gives $$6$$ candies to Billy, they will have the same number of candies. At beginning, Paul has $$17$$ candies. How many candies does Billy have, originally? 
A. $$5$$ 
B. $$6$$ 
C. $$7$$ 
D. $$8$$ 
E. $$9$$ 