Study the given letter, number, symbol series and answer the question that follows.
(Left) \(\yen\) 7 @ 2 W R Z % K 3 P 2 T ϵ J 1 B M 4 8 & \(\yen\) E 5 D # 6 (Right)
How many such letters are there, each of which is immediately preceded by a symbol and immediately followed by a number?
1
4
2
3
3
1
4
2