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.

Example Input: ['q', 'B', 'U', '9387']
Example Output: 17, 2, 21, 9387

Example Input: ['u', 'P', 'n', 'P', '537', '6431', 'u', 'Y']
Example Output: 21, 16, 14, 16, 537, 6431, 21, 25

Example Input: ['517', '3545', '71', 'x', '8097', '8495', '5583', 'S', 'e', '7649', '5293', 'U', 'k', 't', '4949']
Example Output:
517, 3545, 71, 24, 8097, 8495, 5583, 19, 5, 7649, 5293, 21, 11, 20, 4949