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: ['4331', '3187', '2807', '7929', '8829', '4561', 'G', 'I', 'C', '4989', 'r', 'B', '4867', 'k', 'l', '4273', '9801', '3875', 'G', '6877', 'H', '1705', '5397', '2287', '2507', 'd', '7609', 'i', '165', 'u', '5367']

4331, 3187, 2807, 7929, 8829, 4561, 7, 9, 3, 4989, 18, 2, 4867, 11, 12, 4273, 9801, 3875, 7, 6877, 8, 1705, 5397, 2287, 2507, 4, 7609, 9, 165, 21, 5367