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: ['4529', '9263', '8857', 'q', '9029', '3019', '5067', 's', 'z', 'P', 'S', 'F', 'm', '8693', '7249', 'c', 'u', 'z']

4529, 9263, 8857, 17, 9029, 3019, 5067, 19, 26, 16, 19, 6, 13, 8693, 7249, 3, 21, 26