A and B together can complete a piece of work in 35 days. A alone can complete the same work in 60 days. B alone will be able to complete same work in:
Study the following digit-letter-symbol series carefully and answer the question that follows.
Np4@8cQ9%6TkF3=5g4&RwJX
How many such numbers are there in the sequence, each of which is immediately preceded by a letter and immediately followed by a symbol?