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: ['x', '5673', '2059', 'f', 'j', 'e', '435', '7173', 'z']

24, 5673, 2059, 6, 10, 5, 435, 7173, 26