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: ['4053', 'r', '4197', 'K', 'L', '4315', 'H', '1623', 'j', '6889', '9965', '5483', 'S', 'i', 'n', 'w', 'M', '1665', 'r', '6995', '7729', '4627', '9211', 'l', '2139', '9219', '4707', '4823', '4055']

4053, 18, 4197, 11, 12, 4315, 8, 1623, 10, 6889, 9965, 5483, 19, 9, 14, 23, 13, 1665, 18, 6995, 7729, 4627, 9211, 12, 2139, 9219, 4707, 4823, 4055