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', '8755', 'm', 'r', '4925', '9827', 'u', 'm']

20, 8755, 13, 18, 4925, 9827, 21, 13