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: ['3525', 'p', '5189', 'K', '403', '1505', '8467', 'Y', '5701', '2683', '6427', 'm', 'z', 'C', 'e', '7965', '5037', '2519', '601', 'd']

3525, 16, 5189, 11, 403, 1505, 8467, 25, 5701, 2683, 6427, 13, 26, 3, 5, 7965, 5037, 2519, 601, 4