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: ['o', '4037', '4071', '1019', '4045', 'g', 'q', '2371', '5125', 'D', 'I', '5649']

15, 4037, 4071, 1019, 4045, 7, 17, 2371, 5125, 4, 9, 5649