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: ['x', 'w', '3561', 'U', 'G', '1145', 'W', '4993', '1005', 'Z', 'c', 'U', '4115', 'I', '1379', 'O', '3655', 'f', '8877', '4777', '3345', '2323', 'R', '1835', '4957', '6235', '6391', '1593']

24, 23, 3561, 21, 7, 1145, 23, 4993, 1005, 26, 3, 21, 4115, 9, 1379, 15, 3655, 6, 8877, 4777, 3345, 2323, 18, 1835, 4957, 6235, 6391, 1593