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: ['7609', '9355', '6561', '631', '4971', 'I', '4687', '4023', 'h', 'Q', '1449', 's', 'o', 'g', '1599', '6041', 'R', 'n', '9041', '2601', '1867', '2813', '775', '5389', '4507']

7609, 9355, 6561, 631, 4971, 9, 4687, 4023, 8, 17, 1449, 19, 15, 7, 1599, 6041, 18, 14, 9041, 2601, 1867, 2813, 775, 5389, 4507