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: ['T', '3809', 'x', 'W', '8615', 'p', 'n', '1627', 'w', 'L', '8987']

20, 3809, 24, 23, 8615, 16, 14, 1627, 23, 12, 8987