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: ['9117', '165', 'V', 'G', '9247', '2331', '5099', 'J', '2575', 'a', '5307', '9767', 'x', '603', '3635', '9215', 'L', '4079', '3997', '5815', '1909', 'U', 'C', '8193', '5645', '2413', '7315']

9117, 165, 22, 7, 9247, 2331, 5099, 10, 2575, 1, 5307, 9767, 24, 603, 3635, 9215, 12, 4079, 3997, 5815, 1909, 21, 3, 8193, 5645, 2413, 7315