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: ['G', 'r', 'f', 'e', 'F', 'z', '6653', 'n', '4305']

7, 18, 6, 5, 6, 26, 6653, 14, 4305