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: ['i', 'D', 'i', '397', 'X', 'c', '2909', '5945', 'b', 'a', 'g', 'Z', '1977', 'B', '6571', '7139', '9707', '4549', '4329', 's', 'f', 'a', '3691', 's', '7519', 'E', 'N', '5141', 'v', '1609', '4889', 'Q', '7543', '7193', '9959', '5375', '2899', '8395']

9, 4, 9, 397, 24, 3, 2909, 5945, 2, 1, 7, 26, 1977, 2, 6571, 7139, 9707, 4549, 4329, 19, 6, 1, 3691, 19, 7519, 5, 14, 5141, 22, 1609, 4889, 17, 7543, 7193, 9959, 5375, 2899, 8395