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: ['5149', 'F', '7279', '5953', '8129', 'A', 'W', 'U', 'X', 'o', 'B', 'v', 'q', '6105', 'n', 'X', 'S', 'T', '385', '9671', 'l', '6997', 'x', '1893', 'v', '2239', 'Z', '8369', '7431', 'i', 'i', 'N', '9617']

5149, 6, 7279, 5953, 8129, 1, 23, 21, 24, 15, 2, 22, 17, 6105, 14, 24, 19, 20, 385, 9671, 12, 6997, 24, 1893, 22, 2239, 26, 8369, 7431, 9, 9, 14, 9617