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: ['u', '4363', '573', 'a', '7901', 'Z', '2743', '9505', '1469', '4917', 'Y', '9329', 'F', '7989', '5531', '4999', '9975', '4501', 'V', '3341', '9835', 'F', 'V', '7167', 'Q', 'X', '4233']

21, 4363, 573, 1, 7901, 26, 2743, 9505, 1469, 4917, 25, 9329, 6, 7989, 5531, 4999, 9975, 4501, 22, 3341, 9835, 6, 22, 7167, 17, 24, 4233