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: ['k', '6243', 'A', 'X', 'K', '6939', 'b', 'j', '1737', '1481', '7593', '8605', '9427', 'D', '3919', '429', 'V', '5469', '1307', 'h', '9105', '7279', 'T', '8651', '473', '3359', 'E', '1177', '5133', '2857']

11, 6243, 1, 24, 11, 6939, 2, 10, 1737, 1481, 7593, 8605, 9427, 4, 3919, 429, 22, 5469, 1307, 8, 9105, 7279, 20, 8651, 473, 3359, 5, 1177, 5133, 2857