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: ['r', '1373', '355', '3335', 'g', 'Q', '2743', 'D', '9889']

18, 1373, 355, 3335, 7, 17, 2743, 4, 9889