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: ['1043', '3009', 's', 'e', '225', '6379', 'E', '8397', 'j', '6187', 'p', '4797', 'H', 'f', '3515', 'Y', '2265', 'T', 'P', 'Q', '9503', '8825', '3667', '7899', '3339', '3133', '6399', 'S', '2655', 'V', '2661', 'U', '5013', 'j', 'b', '1853', '5641']

1043, 3009, 19, 5, 225, 6379, 5, 8397, 10, 6187, 16, 4797, 8, 6, 3515, 25, 2265, 20, 16, 17, 9503, 8825, 3667, 7899, 3339, 3133, 6399, 19, 2655, 22, 2661, 21, 5013, 10, 2, 1853, 5641