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: ['r', '2489', 's', '961', 'g', '933', '9693', '3077', 'N', 'T', '2711', '5517', 'n', '7079', '3377', 'd', 'Q', '6693', 'L', 'F', '5541', '1245', '6499']

18, 2489, 19, 961, 7, 933, 9693, 3077, 14, 20, 2711, 5517, 14, 7079, 3377, 4, 17, 6693, 12, 6, 5541, 1245, 6499