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: ['341', '2427', '7849', '7771', 'm', '2853', 'd', '2799', '6037', 'x', 'R', '2513', '9115', 'z', 'X', 'U', '7733', 'x', 'H', 'q', '5575', '9997', 'j', 'X', 'y']

341, 2427, 7849, 7771, 13, 2853, 4, 2799, 6037, 24, 18, 2513, 9115, 26, 24, 21, 7733, 24, 8, 17, 5575, 9997, 10, 24, 25