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: ['4075', '9113', '5247', 'I', '5819', 'B', 'A', '3197', '6673', '747', 'A', '8361', 'f', 'g', '7691', 'x', '9337', '8965', '8671', '6257', 'b', '8151', 'Y', '9637', '7497', '975', 'U', '2543', 'C', '5747', 't', 'M', 'F', 'e', '2565', 't', '6731', 'd', 'E']

4075, 9113, 5247, 9, 5819, 2, 1, 3197, 6673, 747, 1, 8361, 6, 7, 7691, 24, 9337, 8965, 8671, 6257, 2, 8151, 25, 9637, 7497, 975, 21, 2543, 3, 5747, 20, 13, 6, 5, 2565, 20, 6731, 4, 5