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: ['F', 'U', 'd', '9683', 'z', 'p', '207', '6797', '1141', 'F', '6829', '6023', '8383', 'c', 'g', '1809', 'e', 'E', '6013', 'a', '6915', 'Q', '7461', '2931', 'd', '1773', '8737', 'K', 'N', '7537', '6677', '521', '8867', 'r', '75', 'w', '5369', 'j']

6, 21, 4, 9683, 26, 16, 207, 6797, 1141, 6, 6829, 6023, 8383, 3, 7, 1809, 5, 5, 6013, 1, 6915, 17, 7461, 2931, 4, 1773, 8737, 11, 14, 7537, 6677, 521, 8867, 18, 75, 23, 5369, 10