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: ['l', 'c', 'v', '1495', 'j', 'k', '5721', 'k', 'R', '5457', '5103', 'A', 'J', 'd', 'e', '6645', 'q', '8419', 'v', '3467', '1037', 'Q']

12, 3, 22, 1495, 10, 11, 5721, 11, 18, 5457, 5103, 1, 10, 4, 5, 6645, 17, 8419, 22, 3467, 1037, 17