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: ['Z', '2733', 'c', '9245', '5333', 'R', '3841', '8867', '2449', '5109', 'W', '9543', '9169', 'm', 'R', 'e']

26, 2733, 3, 9245, 5333, 18, 3841, 8867, 2449, 5109, 23, 9543, 9169, 13, 18, 5