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: ['765', '9821', 'f', '2951', '4201', 'B', 'b', 'J', 'G', '5255', 'W', 'w', '2179', '3233', '8495', '9969', 'g', '9543', '107', '7673', 'V', 'X', '4543', '3813', 'w', 'u', '305', '729', 'c', '8555', '7645', 'I', 'b', 'E', 'd', 'K', '2081']

765, 9821, 6, 2951, 4201, 2, 2, 10, 7, 5255, 23, 23, 2179, 3233, 8495, 9969, 7, 9543, 107, 7673, 22, 24, 4543, 3813, 23, 21, 305, 729, 3, 8555, 7645, 9, 2, 5, 4, 11, 2081