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: ['2045', '9387', 'B', 'V', 'i', 'g', 'W', '4029', '7803', '1111', '5953', '2551']

2045, 9387, 2, 22, 9, 7, 23, 4029, 7803, 1111, 5953, 2551