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: ['y', 'u', 'C', 'a', 'q', 'A', 'q', 'b', '3971', '9321', 'l', '9211', '8367', 'W', '3107', 'S', 'w', 'w', '2779', 'x', 'a', 'v']

25, 21, 3, 1, 17, 1, 17, 2, 3971, 9321, 12, 9211, 8367, 23, 3107, 19, 23, 23, 2779, 24, 1, 22