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: ['4061', '7649', '2845', 'I', 'P', '435']

4061, 7649, 2845, 9, 16, 435