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: ['P', 'P', '1043', 'q', 'O', '295', '8991', 'l', 'L', '6227', 'x', '6161', 'p', '9621']

16, 16, 1043, 17, 15, 295, 8991, 12, 12, 6227, 24, 6161, 16, 9621