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: ['l', 'd', 'L', '4109', 'D', '6641', '5145', '4775', '2223', '5701', 'f', 'w', 'q', '4087']

12, 4, 12, 4109, 4, 6641, 5145, 4775, 2223, 5701, 6, 23, 17, 4087