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: ['C', 'q', '5383', 'o', '3845', 'r', '3205']

3, 17, 5383, 15, 3845, 18, 3205