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: ['2499', 'o', '4925', 'w', '211', '2755', 'T', 'i']

2499, 15, 4925, 23, 211, 2755, 20, 9