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: ['E', '559', 'e', 'b', 'M', '1393', '4341', 'z', '3053', '5561', 'y', '751', '2161', 'e', '7903', '1881', '6337', '4561', 'c', 'z', '2609', '2293', 'q', 'U', '2019', 't', 'b', 'm', 'n', '2091', 'Q']

5, 559, 5, 2, 13, 1393, 4341, 26, 3053, 5561, 25, 751, 2161, 5, 7903, 1881, 6337, 4561, 3, 26, 2609, 2293, 17, 21, 2019, 20, 2, 13, 14, 2091, 17