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: ['r', 'B', 'f', 'v', '1647', '2239', 'y', '7827', '5615', 'e', '6689', 'v', '9835', 'E', 'q', 'D', 'b', '6069']

18, 2, 6, 22, 1647, 2239, 25, 7827, 5615, 5, 6689, 22, 9835, 5, 17, 4, 2, 6069