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: ['H', '3227', 'b', '773', 'H', '9217', 'X', 'i', '4637', 'y', 'g', '4285', '9585', '913', '2743', 'J']

8, 3227, 2, 773, 8, 9217, 24, 9, 4637, 25, 7, 4285, 9585, 913, 2743, 10