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: ['4245', '571', 'q', '3809', 'v', '2481', 'N', 'N', '4361', '3775', 'D', '913', '1423', 'B', '2869', '3965', 'g', 'L', '7401', 'h', '7899', '5849', '135', 'Q', 'c', '3839', 'X', 'z', '6967', 'D', '4639', '347', 'E', '1897']

4245, 571, 17, 3809, 22, 2481, 14, 14, 4361, 3775, 4, 913, 1423, 2, 2869, 3965, 7, 12, 7401, 8, 7899, 5849, 135, 17, 3, 3839, 24, 26, 6967, 4, 4639, 347, 5, 1897