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: ['657', 'B', '7949', 'E', '1411', 'q', 'u', 'U', '8831', 'q', '7581', 'z', '7769', '3093', 'y', '4961', 'I', '3823', '9757', '469', '8505', '7417']

657, 2, 7949, 5, 1411, 17, 21, 21, 8831, 17, 7581, 26, 7769, 3093, 25, 4961, 9, 3823, 9757, 469, 8505, 7417