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: ['G', 'S', 'Q', '7427', '3887', 'L', 'G', '411', '9675', 'T', '9411', 'k']

7, 19, 17, 7427, 3887, 12, 7, 411, 9675, 20, 9411, 11