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: ['3989', 'G', '7221', '1157', '9723', 'u', 'M', 'g', 'Z', 'A', '2253', 'M', 'K', '403', 'X', '1725', 'q', '3107', 'K', '3049', 'o', '8099', '1623', '141', 'x', 'w', 'M', '8849', '7779', 'O', '6281', 'O', 'R', '5347', '857', '8899', '3785']

3989, 7, 7221, 1157, 9723, 21, 13, 7, 26, 1, 2253, 13, 11, 403, 24, 1725, 17, 3107, 11, 3049, 15, 8099, 1623, 141, 24, 23, 13, 8849, 7779, 15, 6281, 15, 18, 5347, 857, 8899, 3785