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: ['7479', '5331', '7557', 's', '1541', '5927', '2099', '8701', 'k', 'C', '8015', '2277', 'q', 'u', 'c', 'k', 'X', '777', '1607', 'J', 'I', 'h', '7391', 'M', 'D', '8075', 'g']

7479, 5331, 7557, 19, 1541, 5927, 2099, 8701, 11, 3, 8015, 2277, 17, 21, 3, 11, 24, 777, 1607, 10, 9, 8, 7391, 13, 4, 8075, 7