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: ['5559', '8475', '2423', 'B', '1651', 'f', '541', '9061']

5559, 8475, 2423, 2, 1651, 6, 541, 9061