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: ['3927', 'I', '3053', '299', '4283', '2471', 'V', 't', 'i', 'v', '4623', 'X', 'e', 'S', 'u', 'v', '2201']

3927, 9, 3053, 299, 4283, 2471, 22, 20, 9, 22, 4623, 24, 5, 19, 21, 22, 2201