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: ['E', 'K', '3045', 'a', '4395', 'f', '4041', '6503', '109', '5237', 'P', '7279', 'V', '5953', '4305', '7741', 'T', 'b']

5, 11, 3045, 1, 4395, 6, 4041, 6503, 109, 5237, 16, 7279, 22, 5953, 4305, 7741, 20, 2