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: ['1893', 'r', '877', '1845', '4459', 'J', '9011', '737']

1893, 18, 877, 1845, 4459, 10, 9011, 737