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: ['2275', 'E', 'f', '2269', '739', '277', '2181', 'v', 'x', '6275', '7293', '7691', 'P', 'D', 'X', 'Z', 'Q', '6185', '8937', '5287', '9883', '7961', 'u', 'Q', '2815', 'Y', '7065', 'V', '6559']

2275, 5, 6, 2269, 739, 277, 2181, 22, 24, 6275, 7293, 7691, 16, 4, 24, 26, 17, 6185, 8937, 5287, 9883, 7961, 21, 17, 2815, 25, 7065, 22, 6559