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: ['9427', 'e', '5481', '5403', 'Q', '7605', 'E', '4607', '1069', '1875', '9259', '5971', 'u', 'H', 'p', 'p', 'y', 'a', 'C', '6049', 'i', 'q', 'Y', '8187', '5207', 'g']

9427, 5, 5481, 5403, 17, 7605, 5, 4607, 1069, 1875, 9259, 5971, 21, 8, 16, 16, 25, 1, 3, 6049, 9, 17, 25, 8187, 5207, 7