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: ['5225', '7083', '8279', 'r', '7817', '7681', '9395', 'X', '2457', 'y', '787', 'Q', '8297', 'V', '1009', '2469', '5121']

5225, 7083, 8279, 18, 7817, 7681, 9395, 24, 2457, 25, 787, 17, 8297, 22, 1009, 2469, 5121