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: ['y', 'L', '1587', '8235', '4495', '2811', 'J', '4389', 'g', '3171', '2569', 'R', '6057', '6261', 'g', '1081', 'I', '4487', '6809', 'p', 'm', '5991', '625']

25, 12, 1587, 8235, 4495, 2811, 10, 4389, 7, 3171, 2569, 18, 6057, 6261, 7, 1081, 9, 4487, 6809, 16, 13, 5991, 625