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: ['C', '1627', '4001', 'K', 'i', 'Q', '39', 'L']

3, 1627, 4001, 11, 9, 17, 39, 12