If 1 is added to each even digit and 1 is subtracted from each odd digit of the number 56218643, how many digits are repeated more than once in the new number thus formed?

Refer to the following letter-number-symbol series and answer the question. Counting is to be done from left to right. All numbers are single-digit numbers. (Left) V 3 J @ L # E Z T 3 G 4 4 4 E 2 & 3 C Y $ G (Right) How many such letters are there each of which is immediately preceded by a number and also immediately followed by a symbol?

How many such pairs of digits are there in the number '2817296458' that have the same number of digits between them as in the natural number sequence, when counted in both forward and backward directions?