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: ['1215', '9957', '5195', 's', 'v', '4831', '5777', '8269', '4073', 'V', 'v', '267', '7769', 'b', '5443', '3575']

1215, 9957, 5195, 19, 22, 4831, 5777, 8269, 4073, 22, 22, 267, 7769, 2, 5443, 3575