How many letters are followed by symbols in the below series?

N $ 7 k Q & t ∞ 1 f J 3 x Z 8 ≠ L w ¥ # V 9 t ± ∑ P 2 r € D 0 @ Y b π 5 n T ! g R 6 v % 

A

8

B

11

C

9

D

10