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: ['i', '9347', '6739', '1417', 'W', 'Q', 'L', '8773', 'b', '8733']

9, 9347, 6739, 1417, 23, 17, 12, 8773, 2, 8733