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: ['y', '9555', '5053', 'H', '8695', 'V', '6605', 'v', 'I', '9983', 'q', 'V', '5519', '1223']

25, 9555, 5053, 8, 8695, 22, 6605, 22, 9, 9983, 17, 22, 5519, 1223