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: ['U', 'B', 'i', 'e', 'k', 'g', '3059', 'H', 'b', '6845', '7987', '7387', '1379', 'j', '1081', 'Q', 'B']

21, 2, 9, 5, 11, 7, 3059, 8, 2, 6845, 7987, 7387, 1379, 10, 1081, 17, 2