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: ['3229', '2829', 'n', 'g', '7611', 'H', 's', 'O', 'D', '8723', 'y', '5031', '7011', '9527', 'Z', '9989', 'h', 'F', '3773', '8025', 'U', 's', '325', '9993', '1977', '3099', 'Q']

3229, 2829, 14, 7, 7611, 8, 19, 15, 4, 8723, 25, 5031, 7011, 9527, 26, 9989, 8, 6, 3773, 8025, 21, 19, 325, 9993, 1977, 3099, 17