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: ['8747', 'i', 'D', 'o', '6575', 'Q', 't', 'E', 'H', 'v', 'm', '8841', '7675', '2129', 'A', '1103', '5635', '2575', 'D', 'X', '3825', 't', 'N', '5333', 'l', 'i', 'D', 'u', '3477', '5587', '2045', '3599', '7829', 'p', 'g', '2215', 'N']

8747, 9, 4, 15, 6575, 17, 20, 5, 8, 22, 13, 8841, 7675, 2129, 1, 1103, 5635, 2575, 4, 24, 3825, 20, 14, 5333, 12, 9, 4, 21, 3477, 5587, 2045, 3599, 7829, 16, 7, 2215, 14