Refer to the following number and symbol series and answer the question that follows. Counting to be done from left to right only.
(NOTE: All numbers are single digit numbers only.)
(Left) 1 $ @ % 1 4 3 * # 6 3 4 £ % 2 @ 6 % 8 % 9 $ (Right)
How many such numbers are there each of which is immediately preceded by a symbol and also immediately followed by a symbol?