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: ['O', '1285', 'I', '7295', 'C', 'Q', '1433']

15, 1285, 9, 7295, 3, 17, 1433