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: ['c', 'S', 'U', 'F', '3867', 'W', '9953', '4377', '6697', '5327', '7515', 'R', 'v', 'A', '4495', '8989', '939', '409', '2095', '3701', 'V', '3201']

3, 19, 21, 6, 3867, 23, 9953, 4377, 6697, 5327, 7515, 18, 22, 1, 4495, 8989, 939, 409, 2095, 3701, 22, 3201