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', 'f', 'v', '6003', '2579', 'A', 'o', '2097']

19, 6, 22, 6003, 2579, 1, 15, 2097