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: ['6097', 'o', '8511', '8351', 'q', 'x', '1769', 'x', '8227', '4905', 'A', '2145', '9885']

6097, 15, 8511, 8351, 17, 24, 1769, 24, 8227, 4905, 1, 2145, 9885