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: ['Z', 'V', '5237', '2215', '6057', 'H', '9715', '215', '9035']

26, 22, 5237, 2215, 6057, 8, 9715, 215, 9035