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: ['2043', '8163', 'o', '2485', 'S', '6253', '9817', '2037', '207', 'd', '5481', '6471', 'R', '4929', '2267', 't', '4167', '2881', '6439', '8451', '3427', 'Y', 'T', 'd']

2043, 8163, 15, 2485, 19, 6253, 9817, 2037, 207, 4, 5481, 6471, 18, 4929, 2267, 20, 4167, 2881, 6439, 8451, 3427, 25, 20, 4