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: ['V', 'b', 'C', 'o', '1929', 'K', '7053', '2329', 'a', '8603', 'q', '7671', '2617', '8823', 'n']

22, 2, 3, 15, 1929, 11, 7053, 2329, 1, 8603, 17, 7671, 2617, 8823, 14