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: ['Q', 'N', '5415', '9799', 'O', '5895', 'Z', '7943', 'U', 'N', 'v', '3415', 'X', '2617', '467', 'e', '6079', '381', '6685', 'O', 'W', 'a', '9817', '1469', 'S', '2621', 'O', 'J', 't', '9853', '3081', 'U', 'x', 'w', 'q', 'b', 'e', '3315', 'V']

17, 14, 5415, 9799, 15, 5895, 26, 7943, 21, 14, 22, 3415, 24, 2617, 467, 5, 6079, 381, 6685, 15, 23, 1, 9817, 1469, 19, 2621, 15, 10, 20, 9853, 3081, 21, 24, 23, 17, 2, 5, 3315, 22