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: ['4081', '4315', '6635', 'J', '3769', 'C', 'p', '1489', '6283', 'k', 'v', '5627', '5387', 'D', '8551', '6357', '5203', '8921', 'j', 'c', 'H', '9991', '7221', '6041', 'z', '8213', '5359', 'u']

4081, 4315, 6635, 10, 3769, 3, 16, 1489, 6283, 11, 22, 5627, 5387, 4, 8551, 6357, 5203, 8921, 10, 3, 8, 9991, 7221, 6041, 26, 8213, 5359, 21