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: ['J', 'x', '8247', '7503', 'e', '7841', '7993', '721', '9495', 'G', '9655', '5415', '1173', 'H', '9969', '3769', 'a', '9457', '2731', '2561', '7169', '5465', 'g', '2123', 'r', 'Y', 'I', '1739', 'G', 'j', '8775', '5799']

10, 24, 8247, 7503, 5, 7841, 7993, 721, 9495, 7, 9655, 5415, 1173, 8, 9969, 3769, 1, 9457, 2731, 2561, 7169, 5465, 7, 2123, 18, 25, 9, 1739, 7, 10, 8775, 5799