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: ['6671', '1643', '3725', 'K', 'n', '5797', '407', 'd', 'L', '3761', 'y', '3223', 'F', '63', 'e', '4413', '1841', 'z', '7733', '3119', 'J', '7661', '5677', 'g', '565', 'v', 'L', '7987']

6671, 1643, 3725, 11, 14, 5797, 407, 4, 12, 3761, 25, 3223, 6, 63, 5, 4413, 1841, 26, 7733, 3119, 10, 7661, 5677, 7, 565, 22, 12, 7987