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: ['L', 'k', 'W', '8793', '7199', 'V', 'C']

12, 11, 23, 8793, 7199, 22, 3