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: ['8981', '335', '2631', '7493', '6601', '8267', '2741', '817', '7893', '9343', 'K', 'i', '8775', 'x', '5711', '1331']

8981, 335, 2631, 7493, 6601, 8267, 2741, 817, 7893, 9343, 11, 9, 8775, 24, 5711, 1331