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: ['6293', '3505', '6069', 'V', 'p', 'C', 'Z', '4621', '4107', '1927', '115', 'O', 'B', '2079', '7145', 'i', 'F', '9497', '2291', '3047', '4541', '7207', '5107', 'D', 'u', '8521', 'u']

6293, 3505, 6069, 22, 16, 3, 26, 4621, 4107, 1927, 115, 15, 2, 2079, 7145, 9, 6, 9497, 2291, 3047, 4541, 7207, 5107, 4, 21, 8521, 21