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: ['7325', '2999', '7991', 'b', '3657', 'D', '305', '7781', '5609', 'x', 'Y', '8397', '7661', 'j', 'g', 'O', '917', 'S', '2637', 'l', 'd', 'Q', '3107', 'z', '3673', 'q', '7221', 'u', 'K', '8859', '4555', '8565', 'i', 'G', '1985']

7325, 2999, 7991, 2, 3657, 4, 305, 7781, 5609, 24, 25, 8397, 7661, 10, 7, 15, 917, 19, 2637, 12, 4, 17, 3107, 26, 3673, 17, 7221, 21, 11, 8859, 4555, 8565, 9, 7, 1985