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: ['8957', '9981', '515', 'm', 'I', 'j', 't', 'E', 'W', 'o', '7581', 'y', '197', '9467', 'a', '3665', '7061']

8957, 9981, 515, 13, 9, 10, 20, 5, 23, 15, 7581, 25, 197, 9467, 1, 3665, 7061