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: ['157', '2859', 'w', 'r', 'p', 'N', 'x', 'U', '7673', '913', '4363', 'o', '495', 'e', '9617', 'E']

157, 2859, 23, 18, 16, 14, 24, 21, 7673, 913, 4363, 15, 495, 5, 9617, 5