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: ['a', 'y', 'k', '2663', '3445', '2645', '4327', 'D', '4591', 'T', 'r', 'n', 'p', '4643', '8109']

1, 25, 11, 2663, 3445, 2645, 4327, 4, 4591, 20, 18, 14, 16, 4643, 8109