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: ['4541', '283', '1431', '5349', '1133', 'd', '9793', 'm', '5729', '8749', '4641', '5435', '5217', 'A', '5155', 'K', '8025', 'f', '4609', '8221', '4221', 'u', '9607', 'z', '9437', '4403', '989', '7989', 'd', 'n', '7047', '8899', 'k', 'r']

4541, 283, 1431, 5349, 1133, 4, 9793, 13, 5729, 8749, 4641, 5435, 5217, 1, 5155, 11, 8025, 6, 4609, 8221, 4221, 21, 9607, 26, 9437, 4403, 989, 7989, 4, 14, 7047, 8899, 11, 18