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', 'S', 'Q', '801', 'U', '6613', '4053', 'z', 'Q', 'j', '1899', '9485', '635', '6291', 'Z', 'l', 'F', 'Z', '4165', '3281', 'C', '2849', '9691', 'q', '4835', '8733', 'k', '6381', 't', '3823', '8263', 'o', 'S', '4735', '1265', '321', 'Y']

24, 19, 17, 801, 21, 6613, 4053, 26, 17, 10, 1899, 9485, 635, 6291, 26, 12, 6, 26, 4165, 3281, 3, 2849, 9691, 17, 4835, 8733, 11, 6381, 20, 3823, 8263, 15, 19, 4735, 1265, 321, 25