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: ['7523', '387', 's', 'q', '3053', '8205', 'P', 'J', '7009']

7523, 387, 19, 17, 3053, 8205, 16, 10, 7009