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: ['2463', '9371', '5863', '3181', '4781', '7433', '9465', '4269', 'V', 'b', 'n', 'X', '6369', 'f', 'u', '9507', 'G', '4823', '8641', '2191', 'o']

2463, 9371, 5863, 3181, 4781, 7433, 9465, 4269, 22, 2, 14, 24, 6369, 6, 21, 9507, 7, 4823, 8641, 2191, 15