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: ['7379', 'G', '2155', 'U', '3031', 'b', 'e', '5273', 'k', '3187', 'd', 'H', '4385', '5879', 'l', 'O', '4313', 'K', '3895', 't', 'a', '8993', '2535', '4399', '4717', '6369', '5507', '4051']

7379, 7, 2155, 21, 3031, 2, 5, 5273, 11, 3187, 4, 8, 4385, 5879, 12, 15, 4313, 11, 3895, 20, 1, 8993, 2535, 4399, 4717, 6369, 5507, 4051