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: ['I', '9229', 'e', '6503', 'z', 'F', '1541', 'V', '9399', 'n', 'J', '9681', 'k', 'x', '4313', 'C', '7615', 'j', 'P', '7793', 'F', '605', '9963', 'U', '6821', '5811', 'U', 'L', '8559', 't', 'U', '2797', '7023', '5157', 'b', '6447', '6029']

9, 9229, 5, 6503, 26, 6, 1541, 22, 9399, 14, 10, 9681, 11, 24, 4313, 3, 7615, 10, 16, 7793, 6, 605, 9963, 21, 6821, 5811, 21, 12, 8559, 20, 21, 2797, 7023, 5157, 2, 6447, 6029