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: ['m', 'w', 'T', 'N', '983', '3779', '3309', '1551', '5553']

13, 23, 20, 14, 983, 3779, 3309, 1551, 5553