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: ['f', 'U', '205', 'p', 'X', 'j', '9173', '41']

6, 21, 205, 16, 24, 10, 9173, 41