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: ['N', '3635', 'a', 'G', '4961', '3627', 'v', '5247', 'A', '8143', '3641']

14, 3635, 1, 7, 4961, 3627, 22, 5247, 1, 8143, 3641