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: ['3591', 'I', 'W', '9727', '1443', 'q', 'R', '23', '2953', 'A', 'p', '7649', '3853', '9097', '1829', '4763', 'i', '3939', 'L', 'S', 'F', 'A', 'o', '6769', '4531']

3591, 9, 23, 9727, 1443, 17, 18, 23, 2953, 1, 16, 7649, 3853, 9097, 1829, 4763, 9, 3939, 12, 19, 6, 1, 15, 6769, 4531