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: ['D', 'F', '2249', '5521', 'X', 'H', '3363', 'j', 'o', '8763', 'q', '1809', 'S', 'X', '3859', '8411', '9639', 'L', 'v', 'I', '7731', '893', 'p', 'M', '3657', '1923', '7867']

4, 6, 2249, 5521, 24, 8, 3363, 10, 15, 8763, 17, 1809, 19, 24, 3859, 8411, 9639, 12, 22, 9, 7731, 893, 16, 13, 3657, 1923, 7867