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.

['7949', '8047', 't', '9913', 'd', '8641', 'n', '8383', '7493', '8819', '6981', 'n', '6287', '8685', 'b', '7535']
7949, 8047, 20, 9913, 4, 8641, 14, 8383, 7493, 8819, 6981, 14, 6287, 8685, 2, 7535

['A', '785', '1403', '5507', '5833']
1, 785, 1403, 5507, 5833

['8419', '7735', '9905', 'k', 'n', 'I', '9989', 'K', '7363', 'G', 'c', '6991', '8637', '9365', '9643', '3335', '2113', '2277', 'Q', '7933', 'L', '9839', 'J', 'R', 'H', 'q', '1815', 'W', 'E', '4617', 's', '3661']

8419, 7735, 9905, 11, 14, 9, 9989, 11, 7363, 7, 3, 6991, 8637, 9365, 9643, 3335, 2113, 2277, 17, 7933, 12, 9839, 10, 18, 8, 17, 1815, 23, 5, 4617, 19, 3661