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: ['d', '5491', 'm', 'I', '7213', '6601', 'k', 'B']

4, 5491, 13, 9, 7213, 6601, 11, 2