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', '4525', 'O', 'Y', '3927', '5539', '8589', '1733', 'C', '2841', 'f', '8139', 'q', '8847', '1455', 'B', '5705', '231', '6423', 'T', 'F', '5277', 'h', '55']

4, 4525, 15, 25, 3927, 5539, 8589, 1733, 3, 2841, 6, 8139, 17, 8847, 1455, 2, 5705, 231, 6423, 20, 6, 5277, 8, 55