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: ['7033', 'W', '3531', 'k', 'z', '8883', 'c', 'a', 'f']

7033, 23, 3531, 11, 26, 8883, 3, 1, 6