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: ['4429', 'I', '8313', 'E', 'P', '5603', 'Q', '3605', '8663', 'i', 'a', '4715', '8833', '745', '8385', '5165', '8207', 'C', '8733', '1827', '9771', 'D', 'F']

4429, 9, 8313, 5, 16, 5603, 17, 3605, 8663, 9, 1, 4715, 8833, 745, 8385, 5165, 8207, 3, 8733, 1827, 9771, 4, 6