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: ['473', 'l', 'v', '2965', 'A', '3963', '4471']

473, 12, 22, 2965, 1, 3963, 4471