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: ['f', '2735', '7003', 'h', '391', '7029', '2377', '8435', '6653', '6057', 'w', '9643', '7623', 'B', '3785', '8013', 'G', '259', '1371', '1947', '893', 'p', 'G', '7615', 'o']

6, 2735, 7003, 8, 391, 7029, 2377, 8435, 6653, 6057, 23, 9643, 7623, 2, 3785, 8013, 7, 259, 1371, 1947, 893, 16, 7, 7615, 15