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: ['2513', 'h', '9485', 'b', 'I', 'c', '9645', 'd', '6169', '6601', '1415', '7115', '3303']

2513, 8, 9485, 2, 9, 3, 9645, 4, 6169, 6601, 1415, 7115, 3303