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: ['5923', 'S', '5365', 'B', '1181', '3669', 'K', 'O', '3399', 'N', '9845', '8579', 't', 'n', 'W', 'S', 'O', '1871', '1889', '9165', 'm', 'u', '8001', '1523', '8777', 'f', 'a', '6949', 'w', '6281', '2843', '5025', 'F', 'M', 'c', 'q', 'W']

5923, 19, 5365, 2, 1181, 3669, 11, 15, 3399, 14, 9845, 8579, 20, 14, 23, 19, 15, 1871, 1889, 9165, 13, 21, 8001, 1523, 8777, 6, 1, 6949, 23, 6281, 2843, 5025, 6, 13, 3, 17, 23