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: ['m', '4513', '5869', '6383', 'i', 'V', 'S', '6635', '5235', '4353', 'e', '1901', 'Z', '6527', '3039', 'D']

13, 4513, 5869, 6383, 9, 22, 19, 6635, 5235, 4353, 5, 1901, 26, 6527, 3039, 4