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: ['f', '657', '5387', 'L', '2613', '209', '2517', '2087', '3253', '7699', 'Y', 'M', 'u', '8801', 'Q', 'g', '5079', 'N', 'H', 'K', '6145', '5373', '5447', '7161', 'k', '6055', 'y', 'i', '5287', '6961', '3271', 'c', '4257', 'm', 'F']

6, 657, 5387, 12, 2613, 209, 2517, 2087, 3253, 7699, 25, 13, 21, 8801, 17, 7, 5079, 14, 8, 11, 6145, 5373, 5447, 7161, 11, 6055, 25, 9, 5287, 6961, 3271, 3, 4257, 13, 6