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: ['3419', 'i', 'f', '2395', '9599', '9005', 'I', '5671', '9359', 'V', '1395', '2623', 'h', '5335', 'T', '169', 'c', '2327', 'c']

3419, 9, 6, 2395, 9599, 9005, 9, 5671, 9359, 22, 1395, 2623, 8, 5335, 20, 169, 3, 2327, 3