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: ['8863', 'Q', 'D', '8573', '9191', 'f', 'o', 'd', '7133', 'a', '6495', 'k', '4905', 'g', 'K', '2903', '6311', 'j', '1183', '77', 'Y', '749', 'L', 'Z', 'S']

8863, 17, 4, 8573, 9191, 6, 15, 4, 7133, 1, 6495, 11, 4905, 7, 11, 2903, 6311, 10, 1183, 77, 25, 749, 12, 26, 19