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: ['7905', 'd', '2833', '4053', 'n', '9267', 'j', 'O', 'h']

7905, 4, 2833, 4053, 14, 9267, 10, 15, 8