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: ['1661', '3835', '5435', 'Q', '8431', '5777', 'G', '9015', '3165', 'Y', 'k', 'U', 'J', 'X']

1661, 3835, 5435, 17, 8431, 5777, 7, 9015, 3165, 25, 11, 21, 10, 24