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: ['f', '127', 'D', 'J', 'f', 'U', 'x', '1443', '8065', 'c', 's', 'i', '7755', '9759', '7147', '7409', 'M', '5901', 'k', 'n', '2617', 'E', 'L', '7949', 'S', 'o', '7591', '4895', 'V', 'Y', 'e', '3499', '9605', 'P', 'a', 'K']

6, 127, 4, 10, 6, 21, 24, 1443, 8065, 3, 19, 9, 7755, 9759, 7147, 7409, 13, 5901, 11, 14, 2617, 5, 12, 7949, 19, 15, 7591, 4895, 22, 25, 5, 3499, 9605, 16, 1, 11