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: ['A', 'L', '2047', '2549', '5591', '291', 'H', 'I', '6403', '9189', 'q', '9905', '587', 'E', '9199', 'i', 'T', '127', '1215', 'W', 'x', '8973', '5821', 'i', '9583', 'Q', 't', '5557', 'X', '5503', '3457', '1571', '4931', '2575', 'J']

1, 12, 2047, 2549, 5591, 291, 8, 9, 6403, 9189, 17, 9905, 587, 5, 9199, 9, 20, 127, 1215, 23, 24, 8973, 5821, 9, 9583, 17, 20, 5557, 24, 5503, 3457, 1571, 4931, 2575, 10