Definition: In this task, you are given an input list A. You need to convert all the alphabets in the list with a number representing their position in the English alphabet. E.g., replace A by 1, B by 2, a by 1, b by 2, and so on.
Input: ['a', '9899', 'I', 'z', '8333', 'e', '9529', '9257', 'J', '1683', '1191']

1, 9899, 9, 26, 8333, 5, 9529, 9257, 10, 1683, 1191