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: ['c', 'o', '4475', 'S', '1007', '1763', 'c', 'Q', '1763', '673', '9629', 'U', 'r', '3277', '7849', 'L', '9777', 'T', '9389', 'V', 'u', 'g', 'M', 'H', '7519', '9983', 'C', 'c']

3, 15, 4475, 19, 1007, 1763, 3, 17, 1763, 673, 9629, 21, 18, 3277, 7849, 12, 9777, 20, 9389, 22, 21, 7, 13, 8, 7519, 9983, 3, 3