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: ['d', '8165', 'd', 'W', '7305', '5185', '4129', 'x', 'i', '4587']

4, 8165, 4, 23, 7305, 5185, 4129, 24, 9, 4587