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: ['6301', '7601', 'c', '7637', 'w', '1893', 'V', '651', 'E', '9645', 'J', '2449', '8133', '8097', '9197', 'a', 'O', '8549', '7697']

6301, 7601, 3, 7637, 23, 1893, 22, 651, 5, 9645, 10, 2449, 8133, 8097, 9197, 1, 15, 8549, 7697