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: ['i', 'H', '3667', '4639', '3029', '145', 'X', '3707', 'k']

9, 8, 3667, 4639, 3029, 145, 24, 3707, 11