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: ['s', '9321', 'j', 'z', '8509', '6089', '2819', 's']

19, 9321, 10, 26, 8509, 6089, 2819, 19