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: ['x', '8731', '8325', 'u', 'H', '901', 'D', 'W', '1763', 'z', 'c', 'k', '4641', 'J', 'C', 'A', 'H', '9277', 'T', '4949', 'p', 'Q', 'o', '4791', '721', '8543']

24, 8731, 8325, 21, 8, 901, 4, 23, 1763, 26, 3, 11, 4641, 10, 3, 1, 8, 9277, 20, 4949, 16, 17, 15, 4791, 721, 8543