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: ['2147', '5547', 'e', '1401', 't', '1721', 'l', '3107', '8327', 'j', 'A', 'd', '5547']

2147, 5547, 5, 1401, 20, 1721, 12, 3107, 8327, 10, 1, 4, 5547