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: ['T', 'H', '9749', 'K', 'U', '2445', 'k', '3535', '5607', '1485', 'd', 'a', '5727', 'r', '9753', 'a', 'Q', '2987', '1877', '133', '2677', '8691']

20, 8, 9749, 11, 21, 2445, 11, 3535, 5607, 1485, 4, 1, 5727, 18, 9753, 1, 17, 2987, 1877, 133, 2677, 8691