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', '1387', 'J', '8657', 'e', 'k', '1281', 'c', 'v', 'Q', '9113', '4379', 'e', '7295', '7905', '8551', 'T']

26, 1387, 10, 8657, 5, 11, 1281, 3, 22, 17, 9113, 4379, 5, 7295, 7905, 8551, 20