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: ['1283', '1043', '8997', '4673', '3493', 'z', '4427', '6639', 'n', 'N', '8843', '6863', '9555', '1145', 'w', '8981']

1283, 1043, 8997, 4673, 3493, 26, 4427, 6639, 14, 14, 8843, 6863, 9555, 1145, 23, 8981