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: ['W', '6535', 'v', 's', 'p', '6085', '3839', 'F', '4407', 'a']

23, 6535, 22, 19, 16, 6085, 3839, 6, 4407, 1