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: ['s', 'M', 'k', 'P', 'G', 'Y', '3209', 'n', '8049', 'V']

19, 13, 11, 16, 7, 25, 3209, 14, 8049, 22