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: ['9281', '5251', '311', 'm', 'x', '345', 'V', '6113']

9281, 5251, 311, 13, 24, 345, 22, 6113